June 1, 2026 · ~28 min read · California · Los Angeles · San Francisco · Oakland · Berkeley

AB 1482, local RSO, and Costa-Hawkins in 2026 — the California three-layer rent-cap triage for buildings where all three potentially apply

In California, a landlord cannot answer “what is my legal maximum rent increase?” by looking up a single number. A building in Los Angeles, San Francisco, Oakland, or Berkeley may be governed by a local rent-control ordinance capping increases at 1.0–3.0%, by AB 1482’s statewide cap of approximately 8–8.8%, or by no rent cap at all — and the answer depends entirely on when the building was first occupied, what type of property it is, and whether the landlord served the right notices at lease commencement. Three buildings on the same block in Los Angeles, constructed in 1974, 1984, and 2018, sit in three completely different legal regimes. This post walks the three-layer California waterfall — Costa-Hawkins, local RSO, and AB 1482 — in the order a landlord must actually apply it, with city-by-city cohort analysis for Los Angeles, San Francisco, Oakland, and Berkeley.

Quick orientation: the three-layer California rent-cap stack in 2026

Before walking each layer in detail, here is the decision waterfall that every California landlord in a rent-controlled city must run for each unit:

1. Is the unit exempt from local rent control under Costa-Hawkins (Cal. Civ. Code §1954.52)? If the building’s first certificate of occupancy was issued on or after February 1, 1995, or if the unit is a single-family home with a proper written notice served at the commencement of the tenancy, or if it is a qualifying condominium, the answer is yes — and the unit bypasses the local RSO entirely and goes to Step 3.
2. Does the local RSO cover this specific building? If the city has a local rent-control ordinance and the building’s first-CoC date falls before the local RSO’s own first-CoC cutoff (which predates the Costa-Hawkins date in LA, SF, and Oakland), the local RSO governs the rent cap. AB 1482 is displaced for rent-cap purposes under Cal. Civ. Code §1947.12(h)(2) because the local RSO provides equal or greater tenant protection. Stop here for rent-cap purposes.
3. Does AB 1482 (Cal. Civ. Code §1947.12) apply? If the unit is not covered by a local RSO (either because Costa-Hawkins exempted it, or because the local RSO’s own scope does not reach this building), and the building’s first CoC is at least 15 years before the date the increase notice is served, AB 1482’s statewide cap applies — approximately 8% (LA MSA) or 8.8% (SF-Oakland-Hayward MSA) for 2026 increases.
4. If neither the local RSO nor AB 1482 applies: no California rent cap exists for this unit. The landlord may raise rent to market at any lease renewal or new-tenancy commencement.

The critical complexity arises in Step 2. In three of the four cities discussed in this post — Los Angeles, San Francisco, and Oakland — the local RSO’s own first-CoC cutoff predates the Costa-Hawkins date by 13–17 years. This creates what we call the gap cohort: buildings that post-date the local RSO’s own cutoff (so the local RSO does not cover them) but pre-date February 1, 1995 (so Costa-Hawkins does not independently exempt them). Gap-cohort buildings fall straight through local rent control into AB 1482. Berkeley has no gap cohort: its Rent Stabilization Program covers all buildings with first CoC before February 1, 1995, using the Costa-Hawkins date itself as its coverage boundary.

Two observations leap out of that table. First, the gap cohort is largest in LA and SF, where the local RSO’s own cutoff predates Costa-Hawkins by 16–17 years. This means that a large fraction of each city’s 1980s apartment construction — built during a period of intense multifamily development in both cities — falls under AB 1482’s ~8% cap rather than the local RSO’s 1.6%–3% cap. Second, Berkeley’s absence of a gap cohort means that virtually all of Berkeley’s pre-1990s apartment stock is covered by the ~1.0% Berkeley RSP cap, with no equivalent high-cap AB 1482 gap-cohort tier. We develop each of these observations below.

Why three layers: the legislative timeline that created the stack

California’s three-layer rent-cap structure did not emerge from a single coherent legislative plan. It is the product of three separate waves of legislation enacted over four decades, each responding to a different political moment and each leaving its own coverage footprint. Understanding the timeline is the shortest path to understanding why the waterfall has the shape it does.

Wave 1, 1978–1982: the local RSO wave. California’s major urban rent-control ordinances were enacted in a tight cluster following the 1978 inflationary shock. Los Angeles enacted its Rent Stabilization Ordinance in 1978 (codified at LAMC Chapter XV, §151.00 et seq.), covering buildings with first CoC on or before October 1, 1978. Berkeley enacted Measure I in 1978, creating the Berkeley Rent Stabilization Program at BMC §13.76. San Francisco enacted the SF Rent Ordinance in 1979 (SF Administrative Code Chapter 37), with first-CoC coverage through June 13, 1979. Oakland enacted Measure EE in 1980, later codified as OMC Chapter 8.22, with coverage reaching buildings with first CoC on or before December 31, 1982. Each of these ordinances drew its coverage line at or near its own enactment date because the political rationale for rent control was to stabilize existing tenancies — not to impose caps on future construction, which was thought to require development incentives rather than price controls.

The first-CoC cutoffs embedded in these ordinances created an immediate tension: new construction was exempt from rent control, but “new” became “old” over time, and a building constructed in October 1979 would be exempted from the SF RSO forever — not because it was new, but because it had the wrong birthday. Over the following 15 years, California saw substantial multifamily construction. Much of this new stock fell into a legal limbo: it post-dated the local RSO’s cutoff (never covered by the local ordinance) and pre-dated the 1995 state law that would establish a new, explicit exemption category.

Wave 2, 1995: Costa-Hawkins. The California Costa-Hawkins Rental Housing Act (Cal. Civ. Code §§1954.50–1954.535, effective January 1, 1996) was a state-level preemption law that set a floor below which local rent-control ordinances could not extend. Its central provision, §1954.52(a)(1), declared that no landlord of a dwelling unit “for which the first certificate of occupancy was issued on or after February 1, 1995” is required by any local ordinance to maintain or limit the rental rate. In plain terms: any building completed after that date is permanently exempt from all local rent control, statewide.

Costa-Hawkins did two additional things. Section 1954.52(a)(2) exempted single-family homes from local rent control where the owner has provided the tenant with a written notice of the SFR exemption at the commencement of the tenancy. Section 1954.52(a)(3) similarly addressed condominiums sold separately. The combined effect: post-1995 buildings, SFRs with proper notice, and qualifying condominiums all fell outside local rent control, permanently, as a matter of state law.

What Costa-Hawkins did not do was close the gap cohort in cities whose own RSO cutoffs predated 1995. A 1985 Los Angeles apartment was already outside the LA RSO’s scope before Costa-Hawkins arrived — Costa-Hawkins was irrelevant to it. The 1985 building remained in the same position after Costa-Hawkins as before: no local rent control, no state cap. For roughly 15 years after 1995, a substantial fraction of California’s rental housing stock had no rent-cap protection whatsoever.

Wave 3, 2019: AB 1482. The Tenant Protection Act of 2019 (AB 1482, codified at Cal. Civ. Code §§1946.2 and 1947.12, effective January 1, 2020) was the first statewide rent-cap law in California’s history. Its key structural features for this analysis are three:

1. Statewide cap: Cal. Civ. Code §1947.12(a)(1) limits rent increases to the lower of 10% or 5% plus the percentage change in the regional CPI. For most California MSAs in 2026, this resolves to approximately 8–8.8%.
2. Rolling new-construction exemption: Cal. Civ. Code §1947.12(d)(4)(A) exempts units “for which a certificate of occupancy has been issued within the previous 15 years.” The trigger is the notice date — if the building’s first CoC was issued less than 15 years before the date the notice is served, the cap does not apply. Buildings issued first CoC on or before approximately December 2011 (for notices served in 2026) are no longer rolling-exempt and are subject to the cap.
3. Displacement rule for local RSOs: Cal. Civ. Code §1947.12(h)(2) explicitly provides that AB 1482 does not apply “to a unit that is subject to a local ordinance requiring just cause for termination of a residential tenancy, to the extent the local ordinance provides equal or greater protections than this section.” When a local RSO covers the unit and provides a lower (more protective) rent cap, AB 1482 is displaced. When the local RSO does not cover the unit (because the unit sits in the gap cohort or Costa-Hawkins cohort), §1947.12(h)(2) has nothing to operate on and AB 1482 applies in full.

AB 1482’s rolling exemption is structurally different from Costa-Hawkins’s fixed-date exemption. Costa-Hawkins creates a permanent exemption for all post-2/1/1995 buildings, forever. AB 1482’s rolling exemption gives newly-constructed buildings a 15-year window, after which coverage attaches permanently. A building issued first CoC in 2007 was AB 1482-exempt in 2020, 2021, and 2022 — and became subject to the cap in 2022, when its first CoC crossed the 15-year threshold. It will remain covered for the rest of its life. The rolling mechanism means AB 1482’s coverage pool grows every year as new cohorts of buildings graduate out of the exemption.

Layer 1 — Costa-Hawkins §1954.52: what it exempts and what it does not

Costa-Hawkins is frequently misunderstood because landlords sometimes believe it exempts a unit from AB 1482. It does not. Costa-Hawkins creates exemptions from local rent control only. AB 1482 is a state law. Costa-Hawkins has no effect on whether AB 1482 applies; that question is governed entirely by AB 1482’s own exemption provisions at Cal. Civ. Code §1947.12(d).

The three Costa-Hawkins exemption categories under Cal. Civ. Code §1954.52(a) are:

Category 1: Post-February 1, 1995 first CoC (§1954.52(a)(1))

The broadest and most frequently triggered exemption. Any building in California whose first certificate of occupancy was issued on or after February 1, 1995 is permanently exempt from local rent control, regardless of the city it is in. For Los Angeles, San Francisco, Oakland, and Berkeley, this means:

• A building completed January 31, 1995 in San Francisco: covered by the SF Rent Ordinance (if it also pre-dates June 13, 1979 — actually not, because first CoC is 1995, which is after the SF RSO’s own cutoff). In practice, a January 1995 SF building falls in the gap cohort (post-SF-RSO-cutoff, pre-Costa-Hawkins), not the RSO cohort. One day later:
• A building completed February 1, 1995 in San Francisco: Costa-Hawkins exempt from the SF RSO. Now subject to AB 1482 if the building’s first CoC is more than 15 years before the notice date (yes, for any 2026 notice — February 1995 is 31 years ago). AB 1482’s ~8.8% cap applies.

The February 1, 1995 date is exact and binary. A building completed January 31, 1995 sits just outside Costa-Hawkins’s post-1995 exemption — not because it is meaningfully “older” but because of the fixed cutoff. In practice, the one-day difference can mean thousands of dollars per year in rent-cap headroom.

Category 2: Single-family homes with written notice (§1954.52(a)(2))

A single-family home (or a condominium where applicable) is exempt from local rent control when the landlord has provided the tenant with written notice at the commencement of the tenancy. The notice requirement is codified at Cal. Civ. Code §1954.53(a)(1) and the specific form varies by jurisdiction. The notice must be in writing, must state that the unit is not subject to local rent control, and must be delivered at or before the tenancy begins — it cannot be served retroactively.

This Category 2 exemption applies even to old SFRs. A single-family home in Los Angeles built in 1960 is within the LA RSO’s first-CoC scope (pre-October 1978) but is exempt from the LA RSO’s rent cap if the owner properly served the Costa-Hawkins notice at the start of the current tenancy. The exemption attaches at the tenancy level, not the building level: it requires a fresh notice at each new tenancy commencement.

Important: the Costa-Hawkins Category 2 SFR exemption removes the unit from the local RSO cap, but it does not automatically exempt the unit from AB 1482’s statewide cap. AB 1482 has its own independent SFR/condo exemption at Cal. Civ. Code §1947.12(d)(2), which requires a separate written notice served at lease commencement. A landlord who served only the Costa-Hawkins SFR notice has exempted the unit from the local RSO but not from AB 1482. Both notices must be served to achieve full exemption from both laws. We develop this two-notice requirement further in the SFR section below.

What Costa-Hawkins does NOT do

Costa-Hawkins does not: (1) exempt any unit from AB 1482; (2) exempt post-1995 buildings from AB 1482’s 15-year rolling-exemption clock (buildings post-2/1/1995 are Costa-Hawkins-exempt from local RSOs and also start the AB 1482 15-year clock on their first-CoC date); (3) exempt from local just-cause eviction protections (in Oakland, for example, just-cause protections under OMC §8.22.300 apply regardless of Costa-Hawkins status); or (4) affect vacancy decontrol rules for units that do remain covered by a local RSO (vacancy decontrol is a separate mechanism in each local RSO).

Layer 2 — Local RSO first-CoC cutoffs: the building-age scope of each ordinance

The four cities covered in this post each have local rent-control ordinances with different first-CoC cutoff dates. Understanding these dates is critical because they define the gap cohort — the buildings that the local RSO does not cover, even though Costa-Hawkins independently exempts only the post-1995 subset of those buildings.

Los Angeles RSO: October 1, 1978 (LAMC §151.02)

The Los Angeles Rent Stabilization Ordinance, codified at LAMC Chapter XV (§151.00 et seq.), was enacted in 1978 in response to the inflationary pressure on rents following the 1978 state property-tax revolt (Proposition 13). LAMC §151.02’s definition of “rental unit” covers a unit in a building that received its first certificate of occupancy on or before October 1, 1978. Buildings with first CoC on October 2, 1978 or later have never been covered by the LA RSO’s rent-cap provision, regardless of how old they are today.

The 2026 LA RSO rent cap for covered buildings operates in two phases. Through June 30, 2026, the cap is a flat 3.0% set by the Los Angeles Housing Department (LAHD) for RSO Year 2025-26. Effective July 1, 2026, Ordinance No. 188558 changes the formula to 90% × the CPI-U for the LA-Long Beach-Anaheim MSA (12-month change ending in July), subject to a 1% floor and a 4% ceiling. The projected post-July cap using a 3.1% CPI reading is approximately 2.8%; LAHD will publish the final figure around June 2026.

The gap cohort in Los Angeles — buildings with first CoC from October 2, 1978 through January 31, 1995 — spans approximately 16 years of construction. This covers a substantial fraction of the multifamily housing built in Los Angeles during the 1980s and early 1990s, a period that saw significant apartment construction in the San Fernando Valley, the Eastside, and throughout the Westside. All of these buildings are now more than 30 years old, well past AB 1482’s 15-year rolling exemption threshold. AB 1482’s ~8% cap (for the LA-Long Beach-Anaheim MSA) is their effective ceiling.

The practical consequence for LA landlords: a building constructed in 1974 (covered by LA RSO, ~3%) is permitted to raise rent at roughly one-third the rate permitted for its 1984 neighbor (gap cohort, AB 1482, ~8%). The gap-cohort building has a higher legal maximum increase precisely because it avoided the more protective local ordinance by virtue of its birth year.

San Francisco Rent Ordinance: June 13, 1979 (SF Admin Code §37.2(p))

The San Francisco Rent Ordinance (SF Administrative Code Chapter 37, Sections 37.1–37.22) was enacted as Proposition R by San Francisco voters and became effective June 13, 1979. SF Admin Code §37.2(p) defines “rental units” subject to the ordinance as those in buildings where the first certificate of occupancy was issued before June 13, 1979. This is the SF RSO’s own scope — it does not depend on Costa-Hawkins for this cutoff.

The SF Rent Board publishes an annual allowable rent increase (AGA) for covered units. For Rent Year 2026-27 (effective March 1, 2026 through February 28, 2027), the AGA is 1.6%, computed as 60% × the SF-Oakland-Hayward MSA March-to-March CPI percentage change (~2.67%), rounded to the nearest tenth. The SF RSO’s banking provision at SF Rent Board Rules §4.12 permits landlords to accumulate unused annual increases across years, subject to a 7%/year release ceiling and a 10%/notice ceiling — making SF’s banking model the most generous of any California RSO.

The SF gap cohort — buildings with first CoC from June 13, 1979 through January 31, 1995 — spans approximately 16 years of construction. This cohort includes much of the multifamily housing built in San Francisco during the 1980s and early 1990s, including substantial construction in neighborhoods such as South of Market, the Mission, and the outer Richmond and Sunset districts that were developed later than the Victorian-era housing stock that forms the core of the RSO-covered inventory. For gap-cohort SF units, AB 1482’s ~8.8% cap (SF-Oakland-Hayward MSA) applies. This is more than five times the 1.6% AGA available to RSO-covered buildings in the same neighborhood.

Oakland Rent Adjustment Program: December 31, 1982 (OMC §8.22.030)

Oakland’s Rent Adjustment Ordinance, passed by voters as Measure EE in 1980 and codified at OMC Chapter 8.22, covers residential units in buildings where the first certificate of occupancy was issued on or before December 31, 1982, per OMC §8.22.030. Buildings with first CoC from January 1, 1983 through January 31, 1995 form Oakland’s gap cohort.

Oakland’s RSO rent cap for covered buildings in 2026 is approximately 1.7%, computed as 100% × the CPI-U for the SF-Oakland-Hayward MSA (March-to-March window), subject to a 3.0% ceiling. Banking under Oakland’s petition-gated model is structurally different from SF’s automatic accrual: unused annual increases are not automatically banked but must be petitioned through the Rent Adjustment Program.

Oakland’s gap cohort — buildings with first CoC from January 1983 through January 1995 — spans only about 12 years compared to the 16-year gaps in LA and SF. Oakland built relatively less multifamily housing during this period than Los Angeles or San Francisco, so the gap cohort’s practical significance is somewhat smaller. However, the Oakland RAP has a distinctive feature that distinguishes it from LA and SF: Oakland’s just-cause eviction protections (OMC §8.22.300, as amended by Measure JJ in 2018) extend to all Oakland rentals regardless of building age — including gap-cohort buildings. A 1985 Oakland apartment building is not covered by the Oakland RSO’s rent cap, but it is covered by Oakland’s just-cause eviction framework. This means AB 1482’s rent cap applies (~8.8%) but AB 1482’s just-cause protections (§1946.2) may be partially displaced by Oakland’s more-protective local just-cause ordinance for eviction purposes.

Berkeley Rent Stabilization Program: February 1, 1995 (BMC §13.76)

Berkeley’s Rent Stabilization Program, enacted by voters as Measure D in 1980 and codified at Berkeley Municipal Code §13.76, is structurally distinct from the other three cities in a critical way: Berkeley’s RSP covers all residential units in buildings with first CoC on or before February 1, 1995 — the same date as Costa-Hawkins. Unlike LA, SF, and Oakland, Berkeley did not limit its RSO coverage to buildings issued first CoC before the ordinance’s own 1980 enactment date. The Berkeley RSP’s coverage runs up to the Costa-Hawkins ceiling. The result: there is no Berkeley gap cohort. Every Berkeley apartment building that pre-dates the Costa-Hawkins threshold (February 1, 1995) is covered by the Berkeley RSP. A 1985 Berkeley building sits under the ~1.0% Berkeley RSP cap, not under AB 1482’s ~8.8%.

The Berkeley RSP 2026 AGA is approximately 1.0%, computed as 65% × the SF-Oakland-Hayward MSA July-to-June CPI percentage change (~1.5%), consistent with Berkeley Rent Board practice under BMC §13.76.100(c). Berkeley’s banking model under §13.76.110(C) is the most generous in California: unlimited accumulation of unused annual increases, with no per-year or per-notice ceiling (except that accumulated increases from prior tenancies are forfeited on vacancy decontrol, consistent with Costa-Hawkins).

The implication is counterintuitive for landlords comparing cities: the same 1985 apartment building is capped at 1.0% in Berkeley, but at 8.8% in Oakland (less than one mile away across the city boundary), and at 8% in Los Angeles. The difference is entirely a function of each city’s local RSO scope.

The §1947.12(h)(2) displacement rule: when AB 1482 is “off” even though it could otherwise apply

AB 1482’s displacement rule, at Cal. Civ. Code §1947.12(h)(2), is the legal mechanism by which a local RSO’s rent cap takes precedence over the statewide cap. The rule provides that AB 1482’s cap “does not apply to a unit that is subject to a local ordinance requiring just cause for the termination of a residential tenancy, to the extent the local ordinance provides equal or greater protections than this section.”

Unpacking this language: the displacement operates when two conditions are met simultaneously. First, the unit must be subject to a local ordinance requiring just cause for eviction. Second, that local ordinance must provide equal or greater protections to tenants than AB 1482 on the relevant dimension (for rent-cap purposes, equal or greater means a rent-cap percentage at least as low as AB 1482’s cap, i.e., the local ordinance must be more restrictive — lower percentage allowed — not less).

For the four RSO-covered building cohorts in this post, the analysis is:

• LA RSO pre-10/1/1978 building: the unit is subject to the LA RSO (which includes both rent cap and just-cause provisions). LA RSO cap (~3%–2.8%) < AB 1482 cap (~8%). LA RSO provides greater protection. §1947.12(h)(2) displaces AB 1482’s rent cap. Applicable cap: LA RSO.
• SF RSO pre-6/13/1979 building: subject to the SF Rent Ordinance (rent cap + just-cause). SF AGA (1.6%) < AB 1482 (8.8%). SF RSO provides greater protection. §1947.12(h)(2) displaces AB 1482. Applicable cap: SF RSO 1.6%.
• Oakland RSO pre-1/1/1983 building: subject to Oakland RAP (rent cap + just-cause under §8.22.300). Oakland cap (~1.7%) < AB 1482 (8.8%). Oakland RSO provides greater protection. §1947.12(h)(2) displaces AB 1482. Applicable cap: Oakland RAP ~1.7%.
• Berkeley RSP pre-2/1/1995 building: subject to Berkeley RSP (rent cap + just-cause under §13.76.130). Berkeley cap (~1.0%) < AB 1482 (8.8%). Berkeley RSP provides greater protection. §1947.12(h)(2) displaces AB 1482. Applicable cap: Berkeley RSP ~1.0%.

Now consider the gap-cohort buildings: a 1984 Los Angeles building, a 1988 San Francisco building, a 1989 Oakland building. None of these buildings are subject to the local RSO’s rent cap (because the local RSO’s own scope does not reach them). The threshold condition for §1947.12(h)(2) displacement — “subject to a local ordinance” — is not satisfied for the rent-cap dimension. AB 1482’s cap therefore applies without displacement. The local RSO’s existence in the same city is irrelevant if that RSO does not specifically cover this building’s first-CoC cohort.

One nuance specific to Oakland: Oakland’s just-cause eviction protections at OMC §8.22.300 apply to all Oakland rentals regardless of building age. A 1984 Oakland building’s rent cap is governed by AB 1482 (Oakland RAP rent cap doesn’t reach it). But for just-cause eviction purposes, the Oakland just-cause ordinance applies and may displace AB 1482’s §1946.2 just-cause protections (because Oakland’s just-cause ordinance provides equal or greater protection for eviction purposes). The rent cap and just-cause components of AB 1482 can be displaced independently: AB 1482 rent cap applies (because Oakland RAP rent cap does not cover this building), but AB 1482 just-cause may be displaced (because Oakland’s universal just-cause ordinance does cover this building).

Layer 3 — AB 1482 as the statewide floor: the gap cohort and the Costa-Hawkins cohort

After clearing the Costa-Hawkins and local RSO filters, the remaining universe of California rental units falls into two groups: those covered by AB 1482 as the statewide floor, and those fully exempt from any rent cap. The dividing line is AB 1482’s 15-year rolling new-construction exemption at Cal. Civ. Code §1947.12(d)(4)(A).

AB 1482 covers this residual universe through two distinct pathways, both of which lead to the same ~8–8.8% cap:

The gap cohort (pathway A): buildings the local RSO misses, pre-Costa-Hawkins

The gap cohort consists of buildings that:

1. Post-date the local RSO’s own first-CoC cutoff (LA: October 1, 1978; SF: June 13, 1979; Oakland: December 31, 1982). These buildings were never within the local RSO’s scope.
2. Pre-date the Costa-Hawkins threshold (February 1, 1995). These buildings are not independently exempt from local rent control under §1954.52(a)(1) — but this is irrelevant since they were already outside the local RSO’s scope.
3. Have a first CoC more than 15 years before the notice date. For a 2026 notice, this means first CoC on or before approximately December 2011 — which is true for all gap-cohort buildings (the newest possible gap-cohort building in LA was completed January 31, 1995, 31 years ago in 2026).

For gap-cohort buildings, the path to AB 1482 coverage is: (1) local RSO does not apply because the building post-dates the RSO’s own cutoff; (2) Costa-Hawkins does not create an independent exemption because the building pre-dates 2/1/1995; (3) AB 1482’s rolling exemption does not apply because the building is more than 15 years old; therefore (4) AB 1482’s statewide cap applies.

The gap cohort’s most significant practical implication is the cap disparity between adjacent buildings. In Los Angeles, a 1975 apartment and a 1983 apartment in the same neighborhood may be of similar size, quality, and tenant profile. But the 1975 building faces a ~3% cap and the 1983 building faces ~8% — a nearly threefold difference in the landlord’s annual rent-increase headroom. This is not an intended policy outcome; it is a historical artifact of the local RSO’s first-CoC cutoff meeting AB 1482’s statewide floor 41 years later.

The Costa-Hawkins cohort (pathway B): buildings exempted from local RSO by state law, not the RSO’s own scope

Buildings with first CoC from February 1, 1995 through approximately December 2011 are Costa-Hawkins exempt from local RSOs (§1954.52(a)(1)) but still within AB 1482’s coverage because they are more than 15 years old. For these buildings, the path to AB 1482 coverage is: (1) local RSO does not apply because Costa-Hawkins exempts post-2/1/1995 buildings from all local rent control; (2) AB 1482’s rolling exemption does not apply because the building is 15+ years old; therefore (3) AB 1482’s statewide cap applies.

In terms of the applicable rent cap, gap-cohort buildings and Costa-Hawkins-cohort buildings are legally identical: both are covered by AB 1482 at approximately 8–8.8%. The difference is purely structural — one set of buildings was always outside local RSO scope; the other was explicitly placed outside it by state law in 1995. The tenant living in a 1988 San Francisco apartment (gap cohort) and the tenant in a 2001 San Francisco apartment (Costa-Hawkins cohort) both face AB 1482’s ~8.8% cap, not the SF RSO’s 1.6% AGA.

AB 1482 cap levels by MSA for 2026

AB 1482’s cap is MSA-specific because the CPI component uses the regional CPI for the metropolitan statistical area where the property is located. For 2026:

The MSA difference explains why a gap-cohort building in Oakland faces an 8.8% cap while a gap-cohort building in Los Angeles faces only ~8%. The formula is identical (5% + CPI), but the SF MSA CPI index ran approximately 0.8 percentage points higher than the LA MSA CPI for the relevant 2025 reference period.

Cohort-by-cohort walkthrough: the four cities in 2026

The following sub-sections apply the three-layer waterfall to each city individually, including the specific numbers for each building cohort in 2026.

Los Angeles: three cohorts, three different answers

Los Angeles has three distinct building cohorts in 2026, each governed by a different legal regime:

The gap cohort and the Costa-Hawkins cohort (labeled “CHA cohort” above) both land on AB 1482 at the same ~8% cap. But their path there differs: gap-cohort buildings were simply never within the LA RSO’s scope; CHA-cohort buildings were explicitly removed from local RSO coverage by the state Costa-Hawkins law. For rent-cap purposes the distinction is irrelevant — both cohorts face AB 1482. But for notice requirements, the AB 1482 initial disclosure obligation under Cal. Civ. Code §1946.2(e) applies to all tenants in both cohorts (unless the landlord exempted the unit from AB 1482 via the SFR/condo notice at §1947.12(d)(2)).

One particularly consequential LA detail: the LA RSO’s October 1, 1978 cutoff is precise. The LA RSO covers a building with first CoC on September 30, 1978; it does not cover a building with first CoC on October 1, 1978. A one-day difference in first-CoC date separates the ~3% LA RSO cap from the ~8% AB 1482 cap. In a market where a $3,000/month two-bedroom is involved, that difference represents $150/month vs. $240/month in maximum annual increase. Landlords self-managing buildings near this boundary should verify the exact first-CoC date on the certificate of occupancy or the city’s permit records.

San Francisco: a pre-1979 RSO cohort and a large gap cohort

San Francisco’s three-cohort structure closely parallels Los Angeles, with the gap cohort spanning June 1979 through January 1995:

San Francisco’s gap cohort is particularly significant because of the city’s housing stock history. Many of San Francisco’s apartment buildings in neighborhoods like South of Market, the Mission, the Haight, and parts of the Inner and Outer Sunset were constructed in the 1980s and early 1990s, when the old Victorian and Edwardian housing stock was being supplemented by new multifamily development. A substantial fraction of that 1980s construction falls squarely in the gap cohort: post-June 1979 first CoC (outside the SF RSO), pre-February 1995 (pre-Costa-Hawkins), and more than 15 years old today (AB 1482 applies).

An important SF-specific contrast: an SF RSO-covered building can, over time, accumulate substantial banking credit under SF Rent Board Rules §4.12. A landlord who has not raised rent for five years on an RSO-covered unit accumulates approximately 8% in banked increases (five years at 1.6%) and can deploy them at a rate of 7%/year and no more than 10%/notice. By contrast, a landlord in a gap-cohort building next door has no banking at all — the AB 1482 forfeit model permanently loses any year not used. The gap-cohort building has a higher annual cap (8.8% vs. 1.6%) but no multi-year accumulation mechanism.

Oakland: the unique universal just-cause interaction

Oakland is the only major California city where just-cause eviction protections extend to the rolling-exempt cohort (post-2011 buildings). A brand-new Oakland apartment building — fully exempt from both the Oakland RAP rent cap and AB 1482’s statewide cap — still cannot evict its tenants without one of the eight enumerated just causes under OMC §8.22.360 (non-payment, material breach, substantial damage, nuisance, refusal of access, owner move-in, substantial rehabilitation, or Ellis Act withdrawal). This makes Oakland unusual among California cities: even uncapped buildings carry full just-cause eviction obligations.

For Oakland landlords in the gap cohort or CHA cohort: the rent cap dimension is AB 1482 (~8.8%). The just-cause eviction dimension is Oakland’s local ordinance (more protective than AB 1482’s §1946.2, since the Oakland ordinance applies universally while §1946.2 applies only when the tenancy is ≥ 12 months). Practically: follow AB 1482 for rent, follow Oakland ordinance for eviction.

Berkeley: no gap cohort, one sharp transition at 2/1/1995

In Berkeley, the transition from ~1.0% (RSP cohort) to ~8.8% (CHA cohort) is the sharpest single-day jump in California rent-cap law. A building issued first CoC on January 31, 1995 is in the Berkeley RSP (~1.0%). A building issued first CoC on February 1, 1995 is in the Costa-Hawkins exempt cohort (AB 1482 ~8.8%). Both buildings were completed within a day of each other; they face an 8.8-fold difference in their annual rent-increase cap. This disparity is the direct result of Costa-Hawkins establishing a fixed statewide date rather than a rolling window — a structural choice that creates permanent cliff effects wherever a local RSO’s coverage runs all the way up to the Costa-Hawkins date (as Berkeley’s does).

Berkeley also extends just-cause protections beyond the rent-stabilized cohort in some circumstances via BMC §13.76.130, which covers most Berkeley residential tenancies. Landlords of Costa-Hawkins-exempt Berkeley buildings should verify whether Berkeley just-cause provisions apply to their specific unit type before serving a no-fault termination notice.

The 2026 graduating class: buildings crossing into AB 1482 coverage this year

AB 1482’s 15-year rolling exemption creates an annual cohort of buildings that cross into coverage for the first time. Buildings issued their first CoC during calendar year 2011 are the “2026 graduating class” — as of 2026, their first CoC is exactly at or slightly past the 15-year threshold, and any increase notice served after the 15-year anniversary of their first CoC date triggers the cap for the first time.

For the cities in this analysis, the 2026 graduating class adds to the AB 1482-covered cohort as follows:

• Los Angeles: Buildings issued first CoC during calendar 2011 graduate during 2026. In LA, these buildings are in the rolling-exempt cohort transitioning to the CHA/gap-cohort tier (both converge on AB 1482 ~8%). Many of these 2011 Los Angeles buildings are mixed-use or multifamily residential constructed during the post-financial-crisis recovery period. Graduating buildings should ensure their leases contain the AB 1482 initial disclosures under Cal. Civ. Code §1946.2(e) for the current tenancy. If the disclosure was not served at the commencement of the current tenancy, it cannot be retroactively served to “start the clock” on just-cause protections — just-cause protections attach as a matter of statute on graduation day regardless of whether the notice was served.
• San Francisco: Similarly, SF buildings first occupied in calendar 2011 graduate into AB 1482 coverage during 2026. Several San Francisco neighborhoods saw condominium-to-rental conversions and new multifamily construction in this period (Mission Bay, Eastern Neighborhoods SoMa, parts of the Tenderloin) that are now entering the AB 1482-covered universe.
• Oakland and Berkeley: The same graduation dynamic applies. Post-2011 buildings in both cities are graduating into AB 1482 coverage during 2026.

The exact graduation date within 2026 depends on the specific first-CoC date of each building. For a building issued first CoC on March 15, 2011, the graduation date is March 15, 2026 — any rent increase notice served on or after that date is subject to the AB 1482 cap. The trigger is the notice date (not the effective date), consistent with AB 1482’s rolling-exemption trigger at §1947.12(d)(4)(A) (“certificate of occupancy has been issued within the previous 15 years” — measured from the notice date). This is different from Washington State’s HB 1217 (which uses the effective date as the trigger), making California’s notice-date trigger the earlier of the two for any increase served before the effective date.

Practical implication: a Los Angeles landlord with a building first occupied June 1, 2011 should not serve a rent increase notice dated May 31, 2026 intending to lock in the uncapped window. A notice served May 31, 2026 is served before the June 1, 2026 graduation date — the building is still rolling-exempt on that notice date, and the increase can be at market rate. But a notice served June 1, 2026 (graduation day itself) is served on the first day the cap applies, and the increase must comply with AB 1482’s ~8% ceiling.

SFRs and condominiums: how the three-layer question changes

Single-family residences and condominiums interact with the three-layer stack differently from multifamily apartment buildings. Both property types can be exempted from both local RSOs and AB 1482 — but doing so requires two independent written notices, and serving one does not satisfy the other.

The Costa-Hawkins SFR exemption (§1954.52(a)(2)): removing the unit from local RSO

Cal. Civ. Code §1954.52(a)(2) provides that a landlord of a single-family dwelling is not required to comply with any local ordinance requiring just cause for termination or limiting the amount of rent a landlord may charge “provided that at the commencement of the tenancy and upon any renewal, the owner shall notify the tenant in writing of the owner’s intent to sell the property.” The exact notice language and requirements are set out in Cal. Civ. Code §1954.53(a)(1). Key points:

• The notice must be provided at the commencement of the tenancy — before or at lease signing, not retroactively.
• The notice applies to SFRs regardless of how old the building is. A 1965 single-family home in Los Angeles (well within the LA RSO’s pre-1978 cohort) can be exempted from the LA RSO rent cap if the owner serves this notice.
• The Costa-Hawkins SFR exemption exempts from the local RSO only. It has no effect on AB 1482.

The AB 1482 SFR/condo exemption (§1947.12(d)(2)): removing the unit from the statewide cap

Cal. Civ. Code §1947.12(d)(2) provides that AB 1482’s rent cap does not apply to single-family owner-occupied residences where the owner occupies the property, or to condominiums where the owner provides written notice to the tenant at the commencement of the tenancy that the unit is exempt. More precisely, the AB 1482 SFR/condo exemption requires:

• For SFRs: the landlord must provide the tenant with a written notice at the commencement of the tenancy specifying that the unit is an exempt single-family home and is not subject to the statewide rent cap. The statutory notice language is found in Cal. Civ. Code §1947.12(d)(5). An SFR landlord who does not provide this notice at lease commencement loses the exemption and is subject to AB 1482 for that tenancy.
• For condominiums: the exemption applies to condominiums “that have been alienated separately from the title of all the other dwelling units.” In plain terms, condominiums that were sold as individual units (not a block sale of the entire building) are generally exempt from AB 1482. Written notice is also required.

The two-notice trap

The most common compliance error for SFR landlords in rent-controlled cities is serving only one of the two notices, not both. Consider a single-family home in Los Angeles built in 1972 (pre-1978, within LA RSO scope):

• To exempt from the LA RSO: serve the Costa-Hawkins SFR notice under §1954.52(a)(2) at lease commencement.
• To exempt from AB 1482: serve the AB 1482 SFR notice under §1947.12(d)(2) / §1947.12(d)(5) at lease commencement.
• If only the Costa-Hawkins notice is served: the unit is exempt from the LA RSO but still subject to AB 1482’s ~8% cap.
• If only the AB 1482 notice is served: the unit is exempt from AB 1482 but still subject to the LA RSO’s ~3% cap.
• If both notices are served: the unit is exempt from both, and rent can be set at market.

In practice, most well-prepared residential leases in California now include both notices as a standard addendum when the property is an SFR. But landlords using older lease templates, self-drafted leases, or leases obtained from property managers who were not tracking AB 1482 when it took effect in January 2020 may have tenancies where only one or neither notice was provided. The consequences of a missing AB 1482 SFR notice: the ~8% cap applies, any increase above that cap is unlawful, and the tenant may petition for a refund of the excess. The consequences of a missing Costa-Hawkins notice: the local RSO cap applies, which in LA is ~3% — significantly more restrictive.

For condominiums: a condo unit that was “alienated separately” (sold individually) is generally exempt from both local RSOs (via Costa-Hawkins §1954.52(a)(3)) and AB 1482 (via §1947.12(d)(2) with notice) — but again, the notices for both laws are independently required. A condo landlord who skips the AB 1482 condo exemption notice may be surprised to find their unit subject to the statewide cap.

Head-to-head: three buildings on the same Los Angeles block

To make the three-layer triage concrete, here is a side-by-side analysis of three apartment buildings located on the same block in a hypothetical Los Angeles neighborhood, constructed in three different decades, all containing 12-unit multifamily buildings of similar size and quality:

The three buildings are located steps from each other. Their tenants may have started their tenancies in the same year. But Building A’s tenants can face at most a 3% increase; Building B’s tenants can face up to 8%; Building C’s tenants can face an unlimited market-rate increase. This disparity is not a function of the current market conditions, the landlords’ behavior, or the tenants’ lease terms — it is entirely a function of which decade each building was constructed.

For a tenant at $2,000/month baseline in each building:

Building B’s landlord has a legal ceiling 2.67 times higher than Building A’s landlord, and Building C’s landlord has no ceiling at all. The $1,200/year difference in maximum increase between Buildings A and B is a direct consequence of the LA RSO’s October 1, 1978 cutoff and AB 1482’s subsequent role as the statewide floor for the uncovered cohort.

The just-cause parallel: how §1946.2 mirrors the three-layer structure

AB 1482 contains two independent components: the rent cap at §1947.12 and the just-cause eviction protection at §1946.2. The three-layer triage described in this post applies primarily to the rent-cap dimension. The just-cause dimension has a parallel but distinct structure, because some local RSOs extend just-cause protections beyond their rent-cap coverage (as Oakland’s OMC §8.22.300 does universally).

For buildings where the local RSO covers both rent cap and just-cause (LA, SF, Berkeley, and the RAP-cohort in Oakland), both AB 1482 components are displaced: the local RSO provides equal or greater protection on both dimensions.

For gap-cohort buildings in LA and SF (local RSO covers neither rent cap nor just-cause for these buildings), AB 1482 provides both the rent cap (~8%) and the just-cause protection (§1946.2 just-cause grounds: owner move-in, substantial repairs, withdrawal from rental market, breach of lease, etc.) for the first time.

For gap-cohort buildings in Oakland (local RSO rent cap does not reach them, but Oakland’s universal just-cause does): AB 1482 rent cap applies, but AB 1482 just-cause is displaced by the local just-cause ordinance. The result is a mixed regime: a 1985 Oakland apartment faces AB 1482’s ~8.8% rent cap AND Oakland’s broader universal just-cause protections (not just AB 1482’s narrower §1946.2 just-cause grounds). In practice, Oakland just-cause is generally more protective than AB 1482 just-cause for eviction purposes, so the Oakland landlord should comply with both the AB 1482 rent cap and the Oakland just-cause ordinance, not the AB 1482 just-cause grounds.

FAQ

My Los Angeles building received its first certificate of occupancy in April 1983 — which law governs its rent increases?

AB 1482 (Cal. Civ. Code §1947.12) governs, not the LA RSO. Your building sits in the LA gap cohort: its first CoC post-dates the LA RSO’s October 1, 1978 cutoff (LAMC §151.02), so the LA RSO’s rent cap never attached to it. And it pre-dates the Costa-Hawkins threshold (February 1, 1995), so Costa-Hawkins does not independently exempt it from local rent control — though since the LA RSO’s own scope already excludes it, that independence is irrelevant. The building’s first CoC is well over 15 years ago, so AB 1482’s rolling new-construction exemption at §1947.12(d)(4)(A) does not apply. AB 1482’s ~8% cap for the LA-Long Beach-Anaheim MSA governs. AB 1482 just-cause protections under §1946.2 also apply, since no more-protective local just-cause ordinance covers this building (LA RSO just-cause applies only to pre-10/1/1978 buildings). Serve an AB 1482-compliant notice with the correct statutory language; ensure the tenant received the §1946.2(e) initial just-cause disclosure at the commencement of the current tenancy.

I own a San Francisco apartment building first occupied in September 1988 — is it subject to the SF Rent Ordinance or AB 1482?

AB 1482 governs. The SF Rent Ordinance covers buildings with first CoC before June 13, 1979 (SF Admin Code §37.2(p)). A September 1988 building post-dates that cutoff and is outside the SF RSO’s scope. Costa-Hawkins does not independently exempt it (the building pre-dates February 1, 1995). The building is more than 15 years old, so AB 1482’s rolling exemption does not apply. AB 1482’s ~8.8% cap (SF-Oakland-Hayward MSA, 5% + 3.8% CPI) governs. Both the AB 1482 rent cap and just-cause eviction protections (§1946.2) apply. Verify that the current tenant received the §1946.2(e) initial just-cause disclosure at lease commencement — if not, serve the notice promptly; just-cause protections attach by statute regardless of whether the notice was served.

Is it possible for a building to be exempt from both the LA RSO and AB 1482 in 2026?

Yes, two categories produce this result. First: a building with first CoC after approximately December 2011 is exempt from AB 1482 via the 15-year rolling new-construction exemption at §1947.12(d)(4)(A). A post-2011 building is also outside the LA RSO’s scope (post-10/1/1978 cutoff and Costa-Hawkins-exempt from any local RSO). For these buildings, no California rent cap applies in 2026. Second: a single-family home in LA where the owner served both the Costa-Hawkins SFR notice at §1954.52(a)(2) AND the AB 1482 SFR notice at §1947.12(d)(2) at lease commencement is exempt from both laws. Both notices must be served at or before lease commencement — serving only one leaves the unit exposed to the other law.

Does the AB 1482 displacement rule under §1947.12(h)(2) mean that AB 1482 never applies in Berkeley, SF, LA, or Oakland?

No — the §1947.12(h)(2) displacement rule only removes AB 1482’s rent cap when the unit is already covered by a local RSO that provides equal or greater protection. It does not remove AB 1482 from buildings the local RSO does not cover. In LA, the LA RSO covers only buildings with first CoC on or before October 1, 1978. A 1985 LA building is not covered by the LA RSO at all, so §1947.12(h)(2) has nothing to trigger on, and AB 1482’s ~8% applies in full. Same logic for gap-cohort buildings in SF (RSO scope ends June 1979) and Oakland (RAP scope ends December 1982). In Berkeley, because the Berkeley RSP covers all pre-2/1/1995 buildings, a 1985 Berkeley building is covered by the Berkeley RSP (~1.0%) and §1947.12(h)(2) does displace AB 1482 for that building. The displacement rule is building-specific: it requires that the local RSO specifically covers this building’s first-CoC cohort.

I bought a single-family home in Oakland built in 1975 and rent it out — does the Oakland RSO apply, or Costa-Hawkins, or AB 1482?

For the rent cap, Costa-Hawkins most likely exempts this SFR from the Oakland RAP rent cap provided the current tenancy began on or after January 1, 1996. Under §1954.52(a)(2), a single-family dwelling is exempt from local rent control when the landlord served the required written SFR notice at the commencement of the tenancy. If that notice was not served, the Oakland RAP may apply — a 1975 first-CoC date falls within Oakland RAP’s pre-1983 coverage scope. AB 1482 has its own independent SFR exemption at §1947.12(d)(2): the landlord must also serve the AB 1482 SFR notice at lease commencement to exempt the unit from the statewide cap. If both Costa-Hawkins and AB 1482 SFR notices were served: no rent cap. If only the Costa-Hawkins notice was served: no Oakland RAP cap but AB 1482 ~8.8% applies. If neither notice was served: Oakland RAP ~1.7% applies (since the building’s first-CoC is pre-1983 and within Oakland RAP scope). For just-cause eviction, Oakland’s universal OMC §8.22.300 protections apply regardless of rent-cap status — exempting the SFR from the rent cap does not exempt it from Oakland’s just-cause eviction requirements.

A 2007 apartment in San Francisco — which law applies in 2026?

AB 1482 applies in 2026. A 2007 SF building post-dates the SF Rent Ordinance’s June 13, 1979 first-CoC cutoff (outside SF RSO scope) and the February 1, 1995 Costa-Hawkins threshold (additionally Costa-Hawkins-exempt from SF RSO). The building’s first CoC in 2007 is more than 15 years before any 2026 notice date — so AB 1482’s rolling exemption does not apply. AB 1482’s ~8.8% cap and just-cause provisions govern. The building is in the Costa-Hawkins-exempt-from-SF-RSO cohort, not the gap cohort (which spans June 1979 to January 1995 in SF). Both cohorts land at the same ~8.8% cap; the distinction is structural. Serve an AB 1482-compliant notice; verify the §1946.2(e) disclosure was provided at the current tenancy’s commencement.

What changes when a post-2011 building in Los Angeles graduates out of AB 1482’s rolling exemption?

Two things attach simultaneously on graduation day: AB 1482’s ~8% rent cap (Cal. Civ. Code §1947.12) and AB 1482’s just-cause eviction protections (§1946.2). For a building with first CoC in, say, August 2011, graduation day falls in August 2026. Any increase notice served on or after that date must comply with AB 1482. The trigger is the notice date (not the effective date) under §1947.12(d)(4)(A). A notice served July 31, 2026 for a building graduating August 1, 2026 is still rolling-exempt and may be at market rate; a notice served August 1, 2026 is subject to the ~8% cap. The §1946.2(e) initial just-cause disclosure: if it was not served at the commencement of the current tenancy, it cannot be retroactively served on graduation day. Just-cause protections attach by statute on graduation day regardless of the disclosure state. Landlords of graduating buildings should also note that the AB 1482 forfeit model applies from day one of coverage — there is no catch-up for uncapped increases that were available pre-graduation, because the cap itself only existed from graduation day onward.

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