Los Angeles Rent Stabilization Ordinance: What Multifamily Owners Should Know

If you own multifamily property inside the City of Los Angeles, the Rent Stabilization Ordinance is the single most consequential rule set affecting how you operate it. It governs how much rent can rise, when, and on what grounds a tenancy can end. Getting it wrong is expensive; assuming it does not apply to you is the most common way owners get it wrong.

The city boundary question comes first

The RSO is a City of Los Angeles ordinance, administered by the Los Angeles Housing Department. It applies inside the city limits. Glendale, Burbank, Pasadena, Santa Monica, West Hollywood, Long Beach and every other incorporated city in the county have their own rules, or none, and the RSO does not reach them.

This is where owners of Valley property most often go wrong. North Hollywood, Van Nuys, Sherman Oaks, Studio City, Encino, Reseda, Northridge and Panorama City are neighborhoods of the City of Los Angeles — they are not separate cities, and property there is subject to the RSO on the same terms as property in Hollywood or Mid-City. Burbank and Glendale sit next door and are separate jurisdictions entirely.

Which properties the RSO covers

LAHD states that the RSO generally applies to rental units in the City of Los Angeles first built on or before October 1, 1978, with an important exception: it does not apply where there is only one single-family dwelling on the parcel. Replacement units can also be drawn in — units built after July 15, 2007 that replace demolished RSO units may be covered under LAMC Section 151.28.

Coverage is broader than "apartment buildings." According to LAHD it includes apartments, condominiums, co-ops, rooming houses, and hotels and motels; mobilehomes in mobilehome parks; rooms in a hotel, motel, rooming house or boarding house occupied by the same tenant for more than 30 consecutive days; and residential units attached to a commercial building. Units in a commercial building converted to rental use after October 1, 1978 may also qualify.

A pre-1978 building is the common case across most of the city’s older rental stock, which is why "my building is probably covered" is the safer working assumption for a Los Angeles multifamily owner until ZIMAS says otherwise.

What the ordinance regulates

Two things, principally: how much rent may be increased, and the grounds on which a tenancy may be terminated. LAHD publishes the allowable annual increase, and it is set by formula rather than left to the owner.

For the period from July 1, 2026 through June 30, 2027, LAHD states the annual allowable increase for RSO units is 3%, unless amended by the City Council. The Council amended the underlying formula to 90% of the average CPI rather than 100%, and effective February 2, 2026 the formula may produce a result between a minimum of 1% and a maximum of 4%.

Two add-ons that older guidance still references have been removed. LAHD states that effective February 2, 2026, landlords may no longer include any additional percentage increase for utilities, and the additional 10% increase for an added dependent is no longer permitted. If you are working from a template or a checklist written before 2026, it may well instruct you to do something no longer allowed.

If your building is newer, you are still regulated

Owners frequently read "built after 1978, not RSO" as "no restrictions." That is not the position. LAHD states that rental units built after October 1, 1978 that are not covered by the RSO are covered by the City’s Just Cause Eviction Protections Ordinance, under which tenants become protected at the end of their first lease or six months after a new lease, whichever comes first — and a landlord must have a legal reason to evict.

Separately, California’s statewide Tenant Protection Act applies to many properties across the state, including in cities with no local ordinance of their own. The practical upshot for a Los Angeles owner: there is no category of rental property here that is simply unregulated, and the question is only which framework applies.

Registration and the parts owners forget

• RSO properties are subject to annual registration with LAHD, and compliance status can affect what an owner is permitted to do — including whether an increase may be imposed.
• Rent increase notices have form, content, and timing requirements. A substantively allowable increase served incorrectly is still an invalid increase.
• No-fault terminations can carry relocation assistance obligations. The amounts are set by the city and are not trivial.
• Keep the rent history for each unit. Under a formula-based regime, what you may charge next year is a function of what you documented charging before.
• On acquisition, obtain the seller’s rent history and RSO registration status during escrow, not after closing.

That last point causes more trouble than any other. See The First 90 Days After Buying a Multifamily Property for the acquisition sequence.

Official sources

• Los Angeles Housing Department (LAHD) — RSO overview, coverage, allowable increases, and registration: housing.lacity.gov
• ZIMAS (zimas.lacity.org) — per-parcel RSO status under the Housing tab
• LAHD RSO Determinations Unit — (213) 928-9097; LAHD hotline — 866-557-7368

If you own rent-stabilized property and want it managed by someone who works with these rules routinely, see our Los Angeles service area or what management costs.