In California, whether a landlord can change your lease terms depends on what kind of tenancy you have. Under a fixed-term lease, the landlord is locked into the written terms until the lease expires and cannot change rent, rules, or other provisions on their own. On a month-to-month tenancy, the landlord can change terms by giving proper written notice, but the change still has to fit within the statewide rent cap, anti-retaliation rules, and fair housing law.
Fixed-Term Leases Are Locked In
A fixed-term lease is a binding contract for a set period. While it’s active, the landlord cannot unilaterally raise the rent, add a pet fee, change the parking rules, or modify any other provision. The terms stay as written until the lease ends.
Two exceptions exist. The lease itself may contain a clause that authorizes specific changes, such as a provision letting the landlord update community rules with advance written notice. And the landlord and tenant can always agree together to modify a term. Any mutual change should be written into an amendment and signed by both parties; a verbal agreement is difficult to enforce if either side later disputes it.
When a Fixed-Term Lease Expires
If you stay past the end of your fixed-term lease and the landlord keeps accepting your rent, California law presumes the tenancy renews on the same terms as a month-to-month agreement.1California Legislative Information. California Code CIV 1945 The rent stays the same and the other lease terms carry over until the landlord follows the notice rules for a change.
This is when many landlords propose new terms. Because the tenancy is now month-to-month, the landlord can serve written notice raising the rent, adding rules, or modifying provisions, as long as the timing and rent cap rules below are met. If the landlord instead offers an entirely new fixed-term lease, you can negotiate; you’re not required to sign one to remain. For properties covered by the Tenant Protection Act, refusing a new lease is not automatic grounds for eviction unless the offer meets specific criteria discussed below.
Changing a Month-to-Month Tenancy
A month-to-month tenancy renews each rental period, and the law gives landlords real flexibility to change terms. When a landlord serves a proper written notice of a change and the tenant continues to occupy the unit after the notice takes effect, the new terms automatically become part of the rental agreement.2California Legislative Information. California Code CIV 827 No signature is required for the change to bind you.
That flexibility still has limits. A change cannot be discriminatory, cannot retaliate against you for exercising a legal right, and cannot exceed the statewide rent cap if your unit is covered.
Required Notice for Lease Changes
Written notice is mandatory. For non-rent changes such as new rules, altered services, or updated policies, the landlord must give at least 30 days’ advance written notice.2California Legislative Information. California Code CIV 827
Rent increases follow a two-tier system based on the size of the increase:
- A 30-day notice is required when the proposed increase, alone or combined with any other increases in the prior 12 months, totals 10% or less of the lowest rent charged during that period.2California Legislative Information. California Code CIV 827
- A 90-day notice is required when the total increase exceeds 10% of the lowest rent charged during the prior 12 months.2California Legislative Information. California Code CIV 827
Notice must be delivered either personally to the tenant or by mail under the procedures in the Code of Civil Procedure. A text, an email, or a verbal conversation does not satisfy the requirement. If the landlord mails the notice, extra days must be added for delivery time under the applicable mailing rules.
How Much a Landlord Can Raise the Rent
Even with proper notice, the size of a rent increase is capped for most residential properties. Under the Tenant Protection Act, a landlord cannot raise rent by more than 5% plus the local percentage change in the cost of living, or 10% total, whichever is lower, over any 12-month period.3California Legislative Information. California Code CIV 1947-12 The cap is measured against the lowest rent charged for that unit during the prior 12 months.
A landlord cannot split a large increase into smaller pieces to get around the cap. No more than two rent increases are allowed in any 12-month period for the same tenant, and their combined total still cannot exceed the cap.3California Legislative Information. California Code CIV 1947-12 Rent discounts, concessions, or credits accepted by the tenant are excluded when calculating the lowest gross rental rate, so a temporary promotional discount won’t artificially lower the baseline.
Properties Not Covered by the Rent Cap
Not every California rental falls under the Tenant Protection Act. If yours is exempt, the statewide cap doesn’t limit the increase, though a local ordinance still might. Common exempt categories include:
- Housing that received its certificate of occupancy within the previous 15 years, calculated on a rolling basis, except for mobilehomes.3California Legislative Information. California Code CIV 1947-12
- Single-family homes and condos, but only if the owner is not a corporation, a real estate investment trust, or an LLC with a corporate member, and the landlord has given the tenant a specific written notice that the property is exempt.3California Legislative Information. California Code CIV 1947-12
- Owner-occupied duplexes where the owner lives in one unit as a principal residence throughout the tenancy, provided neither unit is an accessory dwelling unit.3California Legislative Information. California Code CIV 1947-12
- Deed-restricted affordable housing, school and college dormitories, and housing already subject to a local rent control ordinance stricter than the TPA.3California Legislative Information. California Code CIV 1947-12
The single-family home exemption trips up a lot of tenants. If you rent a house from an individual owner who sent you the required written exemption notice, the TPA rent cap does not apply. But if a corporation or REIT owns that same house, the cap does apply. Check who the actual landlord entity is on your lease.
Local Rent Control Rules Can Be Stricter
Several California cities, including Los Angeles, San Francisco, Oakland, and Berkeley, have local rent control ordinances that can impose tighter caps than state law. The TPA doesn’t replace those local rules. If your city’s ordinance limits annual increases to less than the TPA allows, the local law controls.3California Legislative Information. California Code CIV 1947-12 If your city has no rent control, the TPA is the floor of protection for covered properties.
Local jurisdictions may also impose their own notice requirements, just cause protections, or relocation assistance rules that go beyond state law, so checking your city’s ordinance is worth the time.
Retaliation and Discrimination Are Not Allowed
A landlord cannot raise rent, cut services, or push a tenant out as retaliation for exercising a legal right. Within 180 days of a tenant reporting a habitability issue, filing a complaint with a government agency, or participating in a tenant organization, the landlord is barred from raising rent, reducing services, or initiating an eviction.4California Legislative Information. California Code CIV 1942-5 Threatening to report a tenant to immigration authorities also qualifies as prohibited retaliation.
Federal and state fair housing laws separately prohibit lease changes that target tenants based on race, religion, sex, national origin, disability, familial status, or other protected characteristics. A landlord who adds a “no children in the pool area” rule after a family with kids moves in, or who denies a reasonable accommodation for a disability, is violating fair housing law. These protections apply to every kind of tenancy.
Refusing New Lease Terms and Just Cause Eviction
Once you’ve lived in a covered unit for 12 months or more, the Tenant Protection Act requires the landlord to have a specific legal reason, called “just cause,” to terminate your tenancy.5California Legislative Information. California Code CIV 1946-2 That protection matters when a landlord tries to pressure you into new terms, because it generally prevents eviction for pushing back.
Just cause is divided into two categories. At-fault reasons include failing to pay rent, breaching a material lease term, committing a nuisance, or refusing to sign a lease renewal with similar terms and duration after a written request.5California Legislative Information. California Code CIV 1946-2 No-fault reasons include the owner moving into the unit, withdrawing it from the rental market, or substantial renovations that require the unit to be vacated.
The renewal provision deserves a close read. If the landlord offers you a renewal with similar duration and similar terms and you refuse to sign, that refusal can be at-fault just cause. The word “similar” is doing the work. If the offered renewal contains dramatically different terms, a rent increase above the TPA cap, or burdensome new conditions, refusing to sign is not automatic grounds for eviction. The same TPA exemptions that apply to the rent cap also apply to the just cause rules.
What You Can Do When You Receive a Change Notice
Your response during the notice period sets your legal position. There are three practical paths.
The first is acceptance. If you stay in the unit and keep paying rent after the notice period expires, the law treats that as acceptance of the new terms. They automatically become part of your rental agreement.2California Legislative Information. California Code CIV 827 You don’t need to sign anything for that to happen.
The second is to leave. If you disagree with the changes, you can end the tenancy by giving your own 30-day written notice to vacate before the new terms take effect. Timing matters. Waiting until after the notice period has already run and then trying to dispute the change while still occupying the unit generally means the new terms have already taken effect.
The third is to challenge the change. If you believe the modification violates the rent cap, is retaliatory, or is discriminatory, you can push back. Document everything in writing. Depending on the violation, you can file a complaint with your local rent board (if your city has one), the California Department of Justice, or the federal Department of Housing and Urban Development. For rent cap violations, California law allows tenants to pursue civil remedies. An illegal rent increase does not become legal just because you paid it; you can still challenge it afterward.