In California, whether a landlord can change your lease terms depends on what kind of tenancy you have. A fixed-term lease locks in rent and every other provision until it expires, so the landlord cannot change those terms on their own. A month-to-month tenancy is different: the landlord can modify rent, rules, or other terms by giving proper written notice, as long as the change respects the statewide rent cap, local rent control, anti-retaliation law, and fair housing protections.
Fixed-Term Leases Are Locked In
A fixed-term lease is a binding contract for a set period. While it is active, the rent amount, pet policy, parking rules, guest limits, and every other provision stay exactly as written. Predictability is the point of signing one.
Two exceptions exist. The lease itself may contain a clause allowing specific changes, such as a provision letting the landlord update community rules with advance written notice. And at any time, you and the landlord can mutually agree to a modification. Any mutual change should be put in a written amendment signed by both parties. A verbal agreement to alter a lease term is difficult to enforce and easy to dispute later.
When a Fixed-Term Lease Ends
If you stay in the unit after your fixed-term lease ends 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 terms carry over until the landlord follows the proper notice procedures to change them.
This is when many landlords propose new terms. Because the tenancy is now month-to-month, the landlord can issue a written notice changing rent, adding rules, or modifying provisions, provided they follow the notice rules and rent cap limits below. If the landlord asks you to sign an entirely new lease, you can negotiate, but you are not required to sign one to stay. For properties covered by the Tenant Protection Act, refusing a new lease is not automatically grounds for eviction unless specific conditions apply, discussed further down.
Month-to-Month Tenancies Can Be Changed With Notice
Month-to-month tenancies give landlords real flexibility. Because the tenancy renews each rental period, the landlord can adjust rent, change common-area rules, or add and remove provisions. The mechanism is straightforward: when the landlord serves a proper written notice changing the terms 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
That flexibility has limits. Changes cannot be discriminatory, retaliatory, or designed to evade the statewide rent cap.
Required Written Notice
Any change to a month-to-month tenancy requires written notice before it takes effect. For non-rent changes, like 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:
- A 30-day notice is required when the proposed increase, alone or combined with 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 or by mail following the procedures in the Code of Civil Procedure. A text message, email, or verbal conversation does not satisfy the legal requirement. When the landlord mails the notice, extra days must be added for delivery time.
How Much Rent Can Go Up
Even with correct notice, most rent increases are capped. Under the Tenant Protection Act, landlords 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 the unit during the prior 12 months.
A landlord cannot split a large increase into smaller increments to get around the cap. No more than two 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 Discounts, concessions, or credits accepted by the tenant are excluded when calculating the lowest gross rental rate, so a temporary promotional discount will not artificially lower the baseline.
Properties the Cap Does Not Cover
Several categories of housing are exempt from the TPA rent cap, which means those landlords have no statewide limit on how much rent can rise. The main exempt categories are housing that received its certificate of occupancy within the past 15 years on a rolling basis (excluding mobilehomes); single-family homes and condos owned by individuals (not corporations, REITs, or LLCs with a corporate member) where the landlord has delivered the required written exemption notice; owner-occupied duplexes where the owner lives in one unit as a principal residence; deed-restricted affordable housing; school and college dormitories; and properties already covered by a stricter local rent control ordinance.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 notice, the TPA cap does not apply. If a corporation or REIT owns the same house, it does. Check who the actual landlord entity is.
Local Rent Control May Apply
Cities including Los Angeles, San Francisco, Oakland, and Berkeley have their own rent control ordinances that often cap increases more tightly than state law. The TPA does not override them. If your local ordinance limits increases to less than the TPA allows, the local law controls.3California Legislative Information. California Code CIV 1947-12 Cities may also impose additional notice requirements, just cause rules, or relocation assistance beyond state law, so checking your jurisdiction’s rules is worthwhile.
Changes That Are Never Allowed
Even with notice, some changes are illegal. 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, cutting services, or starting an eviction.4California Legislative Information. California Code CIV 1942-5 Threatening to report a tenant to immigration authorities also counts 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 refuses a reasonable accommodation for a tenant with a disability, is violating fair housing law. These protections apply to every tenancy, fixed-term or month-to-month.
Can You Be Evicted for Refusing a New Lease?
The Tenant Protection Act also restricts a landlord’s ability to evict tenants who have lived in the unit for 12 months or more. Past that threshold, the landlord needs a specific legal reason, known as just cause, to end the tenancy.5California Legislative Information. California Code CIV 1946-2
One at-fault category matters directly here: refusing to sign a lease renewal with similar terms and duration after a written request can count as just cause.5California Legislative Information. California Code CIV 1946-2 The key word is “similar.” If the landlord pushes a renewal with dramatically different terms, a rent hike beyond the TPA cap, or burdensome new conditions, refusing to sign would not automatically give the landlord grounds to evict. The TPA’s exemptions from the rent cap also exempt those properties from the just cause rules.
What to Do When You Receive a Notice of Change
Your response during the notice period sets your legal position. You have three practical paths.
You can accept. Staying in the unit and continuing to pay rent after the notice period ends is treated by law as acceptance, and the new terms become part of your rental agreement.2California Legislative Information. California Code CIV 827 You do not have to sign anything for this to happen.
You can leave. Give your own 30-day written notice to vacate before the new terms take effect. Timing matters. If you wait until after the notice period expires and then try to dispute the change while still living in the unit, you have already accepted it by operation of law.
You can challenge the change. If you believe it violates the rent cap, is retaliatory, or is discriminatory, document everything in writing. Depending on the violation, you can file a complaint with your local rent board, 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 because you paid it; you can still challenge it afterward.
Negotiation is often underused. Landlords generally prefer keeping a reliable tenant to absorbing turnover costs. A direct conversation about your payment history and the cost of vacancy can produce a better outcome than either side expects.