California Rent Increase Laws for Landlords (2026)

Updated September 2026 · Written for self-managing landlords · Not legal advice
In short: California requires 30 days' notice before a rent increase takes effect, and it caps the increase itself.

What California law requires

California is one of the 19 US jurisdictions with a statute that speaks directly to raising rent. It requires 30 days' notice before an increase takes effect, in writing.

Citation: Cal. Civ. Code §§ 827, 1947.12 · read the source

The notice is not one number. 30 days if the increase is 10% or less of the lowest rent charged in the previous 12 months; 90 days if it is more.

How much can you raise it in California?

California caps annual increases at 5% plus the change in the cost of living, or 10%, whichever is lower, with at most two increases in twelve months. Exempt: buildings with a certificate of occupancy issued in the last 15 years, certain owner-occupied single-family homes and condos with the required lease disclosure, deed-restricted affordable housing and dormitories.

California is one of only four US jurisdictions that caps the amount. California, Oregon, Washington and the District of Columbia are the whole list. Everywhere else the limit is what the market and your tenant will bear.
Local rules override this. Charter cities with their own rent stabilization (San Francisco, Los Angeles, Oakland, Berkeley, Santa Monica and others) impose stricter caps where they are more protective.

Can you raise rent mid-lease in California?

No. A fixed-term lease fixes the rent for the term. An increase takes effect at renewal, or on a month-to-month tenancy after proper notice. The exception is a lease that contains its own escalation clause agreed at signing.

Serving the notice so it holds up

Most rent increases that fall apart fall apart on the date, not the amount: the notice went out too late, or nobody can prove when it went out. Count the days from delivery, not from the day you wrote it, and keep the proof.

LandlordPro generates the notice against the state's rule, dates it, records when it was sent, and carries the new rent onto the rent roll on the right day so the ledger and the notice agree.

Generate the notice, keep the proof

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Frequently asked questions

How much notice does a landlord have to give to raise rent in California?

30 days in writing, under Cal. Civ. Code §§ 827, 1947.12.

Is there a limit on how much rent can be raised in California?

California caps annual increases at 5% plus the change in the cost of living, or 10%, whichever is lower, with at most two increases in twelve months. Exempt: buildings with a certificate of occupancy issued in the last 15 years, certain owner-occupied single-family homes and condos with the required lease disclosure, deed-restricted affordable housing and dormitories.

Can rent be raised during a lease in California?

No, unless the lease itself provides for it. A fixed-term lease fixes the rent for the term; an increase belongs at renewal or on a month-to-month tenancy after notice.

Does a California rent increase notice have to be in writing?

Yes.

Do local rules change this in California?

Charter cities with their own rent stabilization (San Francisco, Los Angeles, Oakland, Berkeley, Santa Monica and others) impose stricter caps where they are more protective.

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