Los Angeles Rent Control (RSO)

The Rent Stabilization Ordinance is a City of Los Angeles law, and it applies to rental units in properties first built on or before October 1, 1978. What it reaches is wider than most summaries suggest, which is the common reason a covered tenant concludes they are not covered and stops looking. The rent increase calculator runs the same test from an address.

These are the kinds of unit the ordinance reaches: Apartments; Condominiums; Townhomes; Duplexes; Two or more single-family dwellings on the same parcel; Rooms in a hotel, motel or rooming house occupied by the same tenant for 30 or more consecutive days; Residential units attached to commercial buildings; Accessory dwelling units (ADUs); Junior accessory dwelling units (JADUs); Mobilehomes, and mobilehome spaces in mobilehome parks. One limited exception runs the other way: a unit built after the cutoff that replaces a demolished stabilized unit may itself be covered, which is why a build date after July 15, 2007 is not on its own a finished answer.

Your income does not come into it, your lease does not change it, and how long you have lived there does not matter.

Being covered means three things at once. The rent may only rise by the percentage the LA Housing Department publishes, once every 12 months. The landlord needs a legally recognized reason to end the tenancy. And a no-fault eviction comes with a relocation payment.

That date does not move, and the reason is state law rather than city law. The Costa-Hawkins Rental Housing Act of 1995 stops a California city from extending rent control past the cutoff it already had, so October 1, 1978 is where the line stays. The share of the city's housing that is stabilized gets a little smaller every year, and no council vote can change that on its own.

The certificate of occupancy is the document that matters, not the year the building looks like it was built and not the year the owner says. It is a dated record held by the city, and it is the first thing to pull when the answer is disputed.

Coverage decides more than the rent. A stabilized unit is excluded from home sharing outright, so it cannot lawfully be listed as a short-term rental whoever owns it.

For a stabilized unit the rent may go up once every 12 months, and by no more than the percentage the LA Housing Department publishes for the current cycle. Two increases inside a year is not a smaller increase twice. It is one lawful increase and one that is not.

The ordinance that took effect on February 2, 2026 rewrote how the allowable increase is worked out: 90% of the local inflation figure (CPI, all items) rather than all of it, never below 1% and never above 4%, whatever inflation does in either direction. That formula governs the adjustment of July 1, 2026 and every one after it. The period before it was a transition at 3%. The first year under the formula, July 1, 2026 to June 30, 2027, came to 3%. So from that adjustment on, even in a year of sharp inflation a stabilized rent cannot rise by more than 4%.

A landlord who paid for gas or electricity could add 1% for each on top of the allowable increase. Those utility adders ended on February 2, 2026, and none may be added to an increase dated on or after that day. If a notice of increase dated on or after that day adds one, that part of the increase has no basis.

An increase for an additional tenant is separate and still allowed: up to 10% for each additional tenant, only once that tenant has lived in the unit for 30 consecutive days, and only if the landlord serves notice within 60 days of learning of them, or the right is lost. A replacement tenant who keeps the household at or below its size at the start of the tenancy brings no increase. Adding a dependent brings none either from February 2, 2026; before that date only the first minor dependent child was exempt.

For the current cycle the allowable increase for a stabilized unit is 3%.

Written notice is required before a rent increase takes effect on a periodic tenancy, which means month to month and anything shorter. During a fixed term the rent is what the lease says, and it changes mid-term only where the lease itself provides for it. An increase of 10% or less takes 30 days of notice. Anything above that takes 90 days. Work the percentage out against the lowest rent charged in the 12 months before the increase takes effect rather than against what you are paying today, so a second increase inside one year is added to the first when deciding which period applies. The periods track the size of the increase, not the cap, so a lawful increase can still arrive on a defective notice.

What the ordinance does not reach: A single-family home that is the only residence on the parcel; Units first built after October 1, 1978, with limited exceptions; Hotel, motel and rooming-house rooms rented for fewer than 30 consecutive days.

Most properties outside the ordinance fall under AB 1482 instead, which caps the annual increase at 5% plus regional inflation and never more than 10%, and which starts once a building is 15 years old. That 15 year line rolls forward, so a building that was exempt from AB 1482 when you moved in can become covered during your tenancy.

A single-family home that is the only residence on its parcel sits outside the RSO, by the same Costa-Hawkins rule that freezes the ordinance's date, and a condominium is a different case: the ordinance does reach condominiums built in time, so being a condo is not by itself an answer. What a single-family home or condominium gets from AB 1482 instead depends on two conditions rather than one. The exemption falls away when a corporation, a real estate investment trust, or an LLC with a corporate member owns the property; ownership by an individual or a family trust generally keeps it. And it is conditional on the landlord having given the tenant the written notice the statute prescribes, which is where most exemption claims actually fail.

Some subsidized and institutional housing runs on its own rules rather than on either cap. If your rent is set by a housing authority or by a program agreement, that agreement is what governs, and neither of the caps described here is the right place to look.

Rent stabilization attaches to the property. When a tenant moves out voluntarily the landlord may generally set the rent for the next tenant at whatever the market bears, and the cap then applies again from that new figure. This is vacancy decontrol, and it is also Costa-Hawkins.

Two things follow from it. The first is that a high rent proves nothing. A stabilized unit that turned over recently can be renting at market rate and still be fully covered, so a landlord pointing at the rent as evidence that the ordinance does not apply is pointing at the wrong thing.

The second is that a vacancy is worth money to an owner, which is exactly why the eviction rules sit alongside the rent rules. A landlord cannot reach a lawful reset by making the tenancy untenable. A no-fault eviction carries relocation assistance, and an increase above the cap is unlawful rather than a route to an empty unit.

Three facts settle almost every case: whether the parcel is inside the City of Los Angeles, the date on the certificate of occupancy, and the number of units in the building. All three are public.

ZIMAS, the city's parcel viewer at zimas.lacity.org, takes a street address and returns the parcel record, including whether it sits inside city limits. A Los Angeles postal address is not the same thing as a City of Los Angeles address, and this is where that gets settled.

The Los Angeles County Assessor's property record carries the year built and the unit count for every parcel, searchable by address. Building and Safety holds the permit and certificate of occupancy history, which is what to pull when the assessor's year and the owner's claim disagree. Each record is in a different place and they do not always agree, so there is a page on how to find your building's year built and which of them settles it.

The LA Housing Department is the authority on whether a specific unit is registered as stabilized. It answers by address, and it publishes a text message service that returns the status for an address. The number for it is on housing.lacity.gov, and it is worth using rather than relying on a second-hand answer.

The address check on the rent increase page does the first pass for you and names the source behind every line of the result, so a preliminary answer is never mistaken for a confirmed one.

Ask which exemption is being relied on and get the answer in writing. A written claim that turns out to be wrong is a useful document. Five claims come up again and again, and each one is checkable.

That the property is outside city limits. ZIMAS settles it in one search. Postal city and governing city are different things, and a Los Angeles mailing address in an unincorporated pocket is common.

That it is a single-family home. The assessor record gives the unit count. A house divided into two rented units is not a single-family home for this purpose, and a converted garage or a permitted second unit changes the answer.

That the certificate of occupancy is later than the building looks. Ask for the number and the date. Building and Safety holds the record, and a building that was standing well before the cutoff rarely has a later certificate without a reason that is also on file.

That a substantial remodel made it new construction. Remodeling does not issue a new certificate of occupancy by itself. If the claim is that one was issued, it has a number and a date and both can be checked.

That the unit is not registered with LAHD, so it is not covered. Registration is the landlord's obligation, not a condition of coverage. A stabilized unit that was never registered is a stabilized unit whose owner has not complied, and the missing registration is the landlord's problem rather than a defense.

The RSO is a City of Los Angeles law and it stops at the city boundary. Santa Monica, West Hollywood, Beverly Hills, Culver City, Inglewood, Glendale, Pasadena and Long Beach are separate cities, each setting its own housing rules. Whether any of them has a rent ordinance, and what it allows, is that city's business, and this site does not describe rules it has not checked.

The unincorporated parts of the county, which include East Los Angeles, Marina del Rey and Altadena, are governed by Los Angeles County rather than by any city. They have their own ordinance and their own department, and the city's rules do not reach them either.

The postal address hides all of this. Plenty of addresses that say Los Angeles are governed by the county or by a neighboring city, which is why the jurisdiction check runs before any tool on this site says anything about LA rules.