RSO rent increase 2026 Los Angeles 3% through June 30, 2026 — then ~2.8% under Ord. 188558's 90%-of-CPI formula with a 4% hard ceiling.

The cap depends on the effective date, not the notice date

Ord. 188558 ties the controlling cap to the effective date of the increase, not the date the §827(b) notice is served. A notice served May 1, 2026 with August 1, 2026 effective date is governed by the post-July-1 90%-of-CPI/4%-ceiling formula, even though the notice itself was served during the 3% window. Conversely, a notice served April 1, 2026 with effective date June 1, 2026 is governed by the pre-July 3% flat cap. The bright line is the effective date crossing July 1, 2026, not service date or signature date.

The practical implication: landlords who serve notices in May or June 2026 with effective dates after July 1 must use the post-July formula, which is unlikely to clear 3%. Landlords who want to capture the 3% flat cap need both the notice service and the effective date inside the pre-July window. For a typical first-of-the-month tenant, that means notice served no later than May 30, 2026 with a June 30 or July 1 effective date — except July 1 is itself the cutover, so safest is a June 1 or June 30, 2026 effective date. The free LA RSO calculator handles this date math automatically and surfaces the correct cap based on the effective-date input.

Ord. 188558 — what changed and when

Ord. 188558, adopted by the Los Angeles City Council in December 2025, made three changes to LAMC §151 with separate effective dates:

1. February 2, 2026 — utility pass-throughs and additional-dependent increases repealed. The historic 1% gas + 1% electric pass-throughs under §151.06.01, which had let landlords add 2 percentage points to the §151.06.D base cap when the landlord paid the utility, were eliminated for any notice served on or after February 2, 2026. The 10% additional-dependent increase under §151.06.02 was repealed on the same date. A January 2026 notice that included the utility add-ons remains valid; a February 2, 2026 or later notice with the same add-ons is void.
2. July 1, 2026 — base cap formula changes from flat 3% to 90%-of-CPI / 4%-ceiling. The §151.06.D flat 3% statutory cap is replaced by the lesser of (90% × CPI-U for the LA-Long Beach-Anaheim MSA, 12 months ending the prior April) and a hard 4% ceiling, floored at 1%. The Los Angeles Housing Department publishes the new annual rate each June. The 2026-27 rate using a 3.1% CPI reading projects to roughly 2.8%; the 2025-26 rate is 3% by transitional rule.
3. SCEP registration tightened. §161.352 SCEP registration was already a precondition to a lawful RSO increase, but Ord. 188558 added explicit penalty escalation under §151.10 for service of an increase notice on a unit whose SCEP registration lapsed during the notice period. A registration that was current at notice service but lapses before the effective date now voids the increase.

The combined effect: a landlord who in 2025 could lawfully serve a 3% base + 2% utility + 10% additional-dependent = 15% notice on a covered RSO unit is now capped at 3% through June 30, 2026 and ~2.8% thereafter, with no add-ons. This is the largest 12-month downshift in maximum lawful rent in LA RSO history.

Who is covered, who is exempt

LAMC §151.02 covers a unit only if all of these are true:

• Two or more rental units on the parcel. Single-family detached homes on their own parcel are NOT covered. This is the threshold rule — a parcel with one detached SFR is out regardless of when the SFR was built.
• First Certificate of Occupancy on or before October 1, 1978. Post-October-1978 construction is NOT covered by RSO but IS covered by AB 1482 statewide (unless §1947.12(d)(5) carve-outs apply). The cutover question we hear most: if the building had a substantial 1990s rehab, does that reset the CoC? Generally no — LAHD treats first CoC as the controlling date, not the most recent rehab CoC.
• Not a separately-conveyed condo or townhome after 1978. Subdivision-mapped condominiums and townhomes that were separately conveyed after 1978 are typically not covered, even if the underlying multi-unit structure was built pre-1978.
• Not an owner-occupied duplex with continuous owner occupancy since prior to the tenancy. The owner-occupied-duplex exemption is narrow and requires continuous occupancy from before the tenant moved in. A landlord who moves into one half of a duplex after a long-term tenancy began does not get the exemption.

If a unit fails the RSO coverage test, AB 1482 statewide governs instead — covered up to 8.8% in 2026 with the §1947.12(d)(5) SFR carve-out for natural-person owners. The interaction is detailed in our California rent increase 2026 catalog. Coverage analysis for AB 1482's SFR carve-out is at our California SFR/condo section.

SCEP registration is the precondition

LAMC §161.352 requires every covered RSO unit to be registered in the Systematic Code Enforcement Program. The 2026 SCEP annual fee is $38.75 per unit. SCEP registration must be current at the time of notice service AND at the time the increase takes effect. A registration that lapses during the notice period — for instance, the annual SCEP-bill anniversary falls during the 30-day notice window — invalidates the increase under Ord. 188558's §151.10 escalation.

LAHD's enforcement priority since 2023 has been SCEP-registration lapses. The most common path to an LAHD complaint is a tenant who looks up their building on the LAHD public registration database, finds it lapsed, and complains to LAHD before paying the increase. Practical sequence for a 2026 notice:

1. Confirm SCEP registration is current and renewed through at least the proposed effective date.
2. If renewing soon, renew first, then serve the notice — do not let the renewal date fall inside the notice period.
3. Cite §151.06 and SCEP registration status on the notice itself; tenants who challenge the increase often demand the SCEP record.
4. Save the SCEP renewal receipt with the notice in the compliance log.

No banking — LAMC §151.06.A forfeits unused capacity

LAMC §151.06.A explicitly forfeits any unused portion of a prior year's allowable increase. A landlord who skipped 2023, 2024, or 2025 cannot stack the unused capacity into 2026. This is the most restrictive of the four California banking models in the RentCeiling catalogue:

• LA RSO (LAMC §151.06.A): explicit forfeiture.
• San Francisco (Rent Board Rules §4.12): full banking with 7%/year + 10%/notice ceilings. The most landlord-favorable banking regime in California.
• Berkeley (BMC §13.76.110): accumulation with a Rent Board petition gate. No automatic banking; landlord must petition each accumulated unit of capacity.
• AB 1482 (Cal. Civ. Code §1947.12): silent. Functionally treated as forfeiture by California rent-board practice.

The full side-by-side is at our AB 1482 banking provision comparison. The practical implication for LA landlords: if you are going to take the increase, take it on the full 12-month anniversary, every time. A skipped year cannot be recaptured later.

Notice rule is Cal. Civ. Code §827(b), not RSO-specific

Los Angeles RSO does not impose a city-specific notice-period rule — California state law controls. Cal. Civ. Code §827(b): 30 days for any increase under 10% of the lowest rent in the prior 12 months; 90 days for any cumulative increase of 10% or more in the trailing 12 months. Virtually all RSO increases qualify for 30 days, because both the pre-July 3% cap and the post-July ~2.8% cap are well below the 10% threshold. The 90-day rule almost never bites in LA RSO. The full 30-or-90 analysis is in our AB 1482 90-day notice rule deep-dive — same statute, applies to LA RSO via AB 1482's silent incorporation.

Personal delivery starts the clock on receipt. Mail service adds 5 calendar days under Cal. Code Civ. Proc. §1013. There is no LA-specific mailing-add. The LA RSO notice generator emits a notice with the §151.06 citation, the SCEP-registration status, the §827(b) effective-date math, and the §1013 mailing-add applied.

What happens if you overcharge

LAMC §151.10 layers three independent remedies onto a tenant challenging an unlawful RSO increase:

• Treble overcharge plus attorney fees. §151.10(c) authorizes a private right of action for up to 3x the overcharge plus reasonable attorney's fees. The treble multiplier is the same under §1947.12(h)(3) for AB 1482 violations; the attorney-fee hook is what gets tenant-side counsel involved.
• LAHD administrative penalties. §151.11 authorizes LAHD to assess civil penalties for §151 violations. Penalty amounts escalate with repeat violations and can include SCEP-registration revocation.
• Affirmative defense in unlawful detainer. Collected rent above the §151.04 maximum adjusted rent is "illegal rent" and can be raised as an affirmative defense in unlawful-detainer proceedings. A credible RSO defense typically blocks an eviction outright because the tenant is not in default on the lawful rent — the unlawful overcharge cannot trigger a default.

Defective rent notices also undermine the landlord's posture in just-cause-eviction proceedings under LAMC §151.09 and the parallel Cal. Civ. Code §1946.2 statewide regime. The just-cause linkage is detailed at our just-cause eviction California AB 1482 page — the analysis applies to LA RSO through §151.09's parallel just-cause categories and the §1946.2(d) relocation-payment rule for no-fault terminations.

How RentCeiling enforces RSO for you

The free LA RSO calculator takes (current rent, last-increase date, building first-CoC date, proposed effective date, SCEP registration status) and returns either the pre-July 3% cap, the post-July ~2.8% (or whatever LAHD publishes in June 2026) cap, or the AB 1482 fallback if the unit fails RSO coverage. The LA RSO notice generator emits a printable §827(b) notice with the §151.06 citation, the SCEP-registration status, and the effective-date math. The /compare hub shows how LA RSO's 2026 caps stack against the nine other jurisdictions modeled here. Open rule-set at /rules/index.json; the LA-specific rule-set is at /rules/los-angeles.json.

Run the LA RSO 2026 calculator (free)

Common questions