Free California Rent Increase Notice

A California Rent Increase Notice is the written notice a landlord serves on a tenant before raising rent. Under AB 1482 (Civ Code § 1947.12), most California rentals are subject to a statewide cap of 5% plus the regional CPI, with an absolute 10% ceiling in any 12-month period. The general 30/60-day notice rule under Civ Code § 827 applies regardless of whether the property is AB 1482-covered. Properties exempt from AB 1482 include new construction (certificate of occupancy within the last 15 years), single-family homes and condos owned by a natural person who has provided the tenant with a written exemption notice, and units already covered by a more restrictive local rent ordinance. The form on this page produces a compliant rent increase notice with the AB 1482 calculation sheet attached; the rest of this guide walks through the framework, the exemption rules, and the service requirements.

▶ Watch: California Rent Increase Notice — AB 1482 / Civ Code § 1947.12 explained

What this notice does

A California Rent Increase Notice is the written instrument a landlord uses to change the amount of rent owed under a tenancy. It does three things at once. First, it is the formal notice required by Civ Code § 827 — the general statute that requires written notice in advance of any rent change in a periodic tenancy (typically month-to-month). Second, for AB 1482-covered properties, it is the document that demonstrates compliance with Civ Code § 1947.12 — the statewide rent cap. Third, it is the contemporaneous record of the calculation and effective date, which becomes the landlord’s compliance evidence if the tenant later challenges the increase.

The notice is not optional, and the rules are not waivable. A landlord cannot raise rent verbally, by texting the tenant a number, or by leaving a Post-it note on the door. The increase must be in writing, must state the new amount and the effective date, must be served in a manner the law recognizes, and must comply with the statutory cap if the property is AB 1482-covered. An increase that fails any of those requirements is unenforceable — the tenant continues to owe only the old rent until a compliant notice is served and the notice period runs.

The form on this page produces a signed, dated notice with the AB 1482 calculation sheet attached. It captures the property address, the parties, the current rent, the proposed new rent, the effective date, the cap math (current CPI, applicable cap percentage, the resulting maximum allowable rent), and the appropriate notice language. The compliance package — signed notice, calculation sheet, proof of service — is what wins a tenant petition or a defense to unlawful detainer.

AB 1482 — Civ Code § 1947.12 framework

AB 1482, the California Tenant Protection Act of 2019, took effect on January 1, 2020 and is codified at Civ Code § 1947.12 (the rent cap) and § 1946.2 (just-cause eviction). The Act covers most California rental properties more than 15 years old and creates a statewide rent ceiling that operates independently of (and floors, but does not preempt) local rent control.

The cap formula. Annual rent increases on covered properties are limited to 5% plus the percentage change in the cost of living for the metropolitan area where the property is located, with an absolute ceiling of 10%. The “percentage change in the cost of living” is the percentage change in the Consumer Price Index for All Urban Consumers (CPI-U) for the metropolitan area. For increases taking effect on or after August 1 of any calendar year, the CPI used is the change between April of the current year and April of the prior year. For increases taking effect before August 1, the CPI used is the change between April of the prior year and April of the year before that. The CPI is published annually by the U.S. Bureau of Labor Statistics; the California Department of Industrial Relations and the California Apartment Association both publish reference numbers each year.

The 12-month rule. Civ Code § 1947.12 limits the landlord to two rent increases in any 12-month period, and the combined amount cannot exceed the annual cap. The 12-month lookback runs from the date of the new increase, not from the calendar year. Splitting a single excessive increase into two smaller increases inside a 12-month window — to dodge the cap — is a clear violation.

Vacancy decontrol. The cap applies only to existing tenancies. There is no limit on the initial rent charged for a vacant unit. When a tenant vacates and a new tenant moves in, the landlord can reset the rent to market without restriction (subject to local ordinances). The vacancy-decontrol provision means the cap is not a permanent ceiling on the unit — only on the existing tenancy.

Just-cause coverage. Under Civ Code § 1946.2, AB 1482 also requires “just cause” for terminating a tenancy of more than 12 months (or 24 months if any tenant has been there fewer than 24 months and other tenants have been there more than 24 months). For “no-fault” terminations (owner move-in, substantial remodel, withdrawal from rental market, government order), the landlord owes one month’s rent in relocation assistance. The just-cause framework is independent of the rent cap but applies to the same set of covered properties.

Sunset. AB 1482 was originally set to expire on January 1, 2030. The Legislature has shown sustained intent to extend the framework; landlords should plan as if the cap and just-cause provisions will continue indefinitely. The current expiration date should be verified at the time you rely on the law.

Exemptions from AB 1482

AB 1482 exempts five categories of property. The exemptions are technical, and several have notice requirements that landlords routinely overlook.

1. New construction — 15-year rolling exemption

Properties with a certificate of occupancy issued within the last 15 years are exempt. The exemption rolls forward each year: as of 2026, properties built before 2011 are covered; properties built in 2011 or later are exempt. The exemption is by certificate-of-occupancy date, not by purchase date, renovation date, or any other date. A 1980s building substantially renovated in 2020 is still covered — the original certificate of occupancy controls.

2. Single-family homes and condominiums — natural-person exemption with required notice

Single-family homes and condominiums are exempt from AB 1482 only if (a) they are owned by a natural person and not by a corporation, REIT, or LLC where any member is a corporation, AND (b) the landlord has provided the tenant with a written exemption notice. The notice must be in the rental agreement for any tenancy started or renewed on or after July 1, 2020. This is the trap. Many landlords assume the exemption applies automatically; it does not. Without the written notice, the property is treated as covered. The required notice language is set by statute and must read substantially as follows:

“This property is not subject to the rent limits imposed by Section 1947.12 of the Civil Code and is not subject to the just cause requirements of Section 1946.2 of the Civil Code. This property meets the requirements of Sections 1947.12 (d)(5) and 1946.2 (e)(8) of the Civil Code and the owner is not any of the following: (1) a real estate investment trust, as defined by Section 856 of the Internal Revenue Code; (2) a corporation; or (3) a limited liability company in which at least one member is a corporation.”

3. Deed-restricted affordable housing

Units that are restricted by deed, regulatory restriction, or other recorded document as affordable housing for lower-income households are exempt. The exemption is for affordability covenants, not for general subsidies. A unit receiving a Section 8 voucher is not exempt unless there is also a recorded affordability restriction.

4. Certain school dormitories

Dormitories owned and operated by an institution of higher education or a K-12 school are exempt. This is a narrow exemption for traditional student housing.

5. Already-covered local rent control

Units that are already subject to a local rent control ordinance that restricts annual increases to less than the AB 1482 cap remain subject to the local ordinance. AB 1482 floors the protection in those cases — the local rule is the operative cap. AB 1482 does not preempt or weaken existing local rent control; it adds protection where local control is absent or weaker.

AB 1482 cap calculator

Enter your current rent and the applicable regional CPI to compute the maximum allowable rent under Civ Code § 1947.12. The calculator applies the 5%+CPI formula with a 10% absolute ceiling and shows you the cap percentage, the maximum allowable new rent, and the date by which the next increase becomes available under the 12-month rule.

Rent increase notice form

Complete the form below to generate a compliant rent increase notice. The notice produced is suitable for service under Civ Code § 827 and includes the AB 1482 calculation sheet for properties subject to § 1947.12. For increases of 10% or less, serve at least 30 days before the effective date. For increases over 10% (only on AB 1482-exempt properties), serve at least 90 days before the effective date. Add three days if served by mail.

Service and notice periods

The notice period under Civ Code § 827 depends on the size of the increase. Increases of 10% or less require 30 days’ written notice; increases over 10% require 90 days’ written notice. The notice period runs from the date of service. If the notice is served by mail, Code Civ Proc § 1013(a) adds three days to the period — so a 30-day notice served by mail effectively gives the tenant 33 days.

Methods of service. Personal service is the cleanest — the landlord (or agent) hands the notice directly to the tenant. Mail service is acceptable but adds three days. Post-and-mail (posting on the door plus mailing a copy) is acceptable when personal service has been attempted but failed; it also adds three days. Email and text are not statutory methods of service for a rent increase notice and should not be relied on as the primary method, though they can supplement.

For AB 1482-covered properties, the cap controls the size of the increase, not the notice period. An over-the-cap increase is unenforceable regardless of how much notice is given. A landlord cannot trade a longer notice period for a larger increase.

For AB 1482-exempt properties, the cap does not apply but the notice rules do. An exempt landlord can raise rent by any amount, but must give the appropriate notice (30 days if ≤10%, 90 days if >10%) and must not have any other restrictions (lease term, local ordinance, anti-price-gouging during a state of emergency).

Local rent control overrides AB 1482

AB 1482 is a statewide floor, not a ceiling. Cities with local rent control ordinances that are more restrictive than AB 1482 — and many are — apply their own rules. The most restrictive applicable rule controls. The major rent-controlled California cities include Oakland, Berkeley, San Francisco, Los Angeles, Santa Monica, San Jose, Hayward, Mountain View, East Palo Alto, Beverly Hills, West Hollywood, Inglewood, Bell Gardens, and Richmond, among others.

Local caps are typically far lower than AB 1482’s 5%+CPI formula. Recent reference points:

• Oakland: Annual adjustment around 0.8%–3% (formula based on CPI alone, no plus-five)
• Berkeley: 1.0% recent annual cap
• San Francisco: 60% of CPI (typically 1%–2.5%)
• Los Angeles RSO: Currently capped via emergency moratoria; check the L.A. Housing Department for current numbers
• Santa Monica: Annual general adjustment based on local CPI formula

Where to verify. Each rent-controlled city has its own rent board or housing department. Always verify the current cap on the official rent board website before issuing the notice — the local cap changes annually and emergency moratoria can override the formula. A local cap that’s lower than AB 1482 is the operative cap; AB 1482 does not preempt or weaken the local rule.

Anti-price-gouging during emergencies. Independent of AB 1482 and local rent control, California’s anti-price-gouging law (Penal Code § 396) caps rent increases at 10% above the previously charged or advertised price for 30 days following a declared state of emergency, with possible extensions. This applies to all properties, including AB 1482-exempt units, and overrides higher caps. Wildfire, earthquake, and other emergency declarations routinely trigger these caps.

Common mistakes that expose landlords

Assuming the single-family/condo exemption applies automatically

The most common AB 1482 mistake. The exemption requires the written exemption notice in the rental agreement (or otherwise served on the tenant for pre-July 2020 tenancies). Without the notice, the property is treated as covered — the cap applies. Many landlords with single-family rentals raise rent by 8%, 10%, or more thinking they’re exempt, and find out the hard way when the tenant files a petition or refuses to pay the unlawful overage.

Ignoring the 12-month frequency rule

Civ Code § 1947.12 limits the landlord to two increases per 12 months and the combined amount cannot exceed the cap. Splitting one large increase into two smaller ones inside a 12-month window is a clear violation. The 12-month lookback runs from the date of the new increase, not the calendar year — if you raised rent on March 1 of last year, you cannot raise it before March 1 of this year, even by a small amount.

Using the wrong CPI

The CPI used must be the regional CPI for the metropolitan area where the property is located, not the statewide or national number. The published numbers vary significantly across regions — the San Francisco metro and the Riverside metro can differ by a percentage point or more in any given year. Using the wrong CPI is a documentation error that will lose at a tenant petition.

Failing to add the three-day mail service period

Code Civ Proc § 1013(a) adds three days to a notice period when the notice is served by mail. A 30-day notice served by mail effectively gives the tenant 33 days. Calculating the effective date based on the date of mailing without the three-day add-on results in a defective notice.

Raising rent during a fixed-term lease

A fixed-term lease locks the rent for the term. The landlord cannot raise rent mid-lease without the tenant’s written consent. Any “automatic escalator” clause in the lease that would raise rent above the AB 1482 cap is unenforceable.

Ignoring local rent control

If the property is in Oakland, Berkeley, San Francisco, Los Angeles, Santa Monica, San Jose, or another rent-controlled city, the local cap applies — and is typically far lower than AB 1482. AB 1482 does not preempt local control; the more restrictive rule controls.

Not retaining the calculation sheet

The calculation sheet is the landlord’s compliance evidence. If a tenant files a petition or defends an unlawful detainer based on an alleged over-the-cap increase, the calculation sheet (current rent, applicable CPI, regional source, cap percentage, new rent, effective date) is what proves compliance. Without it, the landlord is reconstructing the math under cross-examination.

Issuing an increase during an active emergency declaration

California’s anti-price-gouging law (Penal Code § 396) caps rent increases at 10% above the previously charged price for 30 days after a declared state of emergency, with possible extensions. Emergency declarations are routine in California (wildfire, earthquake, flood). An increase that would otherwise be permissible under AB 1482 can become unlawful if served while an emergency cap is in effect.

Tenant rights and remedies

Tenants have several rights under AB 1482 and the general California rent increase framework. Understanding these helps landlords appreciate the procedural framework and the consequences of departing from it.

Right to refuse an unlawful increase

An over-the-cap increase is unenforceable. The tenant continues to owe only the lawful rent. A landlord who serves a three-day notice to pay rent or quit based on the unlawful increase will lose the unlawful detainer — the tenant has not actually defaulted because the unlawful portion of the increase was never legally owed.

Right to refund of the unlawful overage

If the tenant has paid an over-the-cap increase, the tenant can recover the overage. Civ Code § 1947.12(j) establishes a private right of action; a tenant can sue in small claims or civil court for refund of unlawful payments. The four-year statute of limitations under Code Civ Proc § 337 applies to written agreement claims; the three-year limit under § 338 applies to statutory claims.

Right to attorney’s fees in some cases

If the rental agreement has a bilateral attorney’s fees clause (Civ Code § 1717), the prevailing tenant can recover fees in an action enforcing AB 1482. Some local ordinances also have fee-shifting provisions favoring tenants in rent-control disputes.

Right to file with the local rent board

In rent-controlled cities, tenants can file a petition with the local rent board to challenge an alleged over-the-cap increase. Rent boards have administrative authority to order refunds and impose civil penalties. The petition process is typically faster and cheaper than civil litigation.

Right to defend an unlawful detainer based on an unlawful increase

If the landlord serves a three-day notice to pay rent or quit based on rent that includes an unlawful AB 1482 overage, the tenant can defend the unlawful detainer on the ground that the alleged default rests on unlawful rent. This is a complete defense — the landlord cannot evict for failure to pay rent that wasn’t lawfully owed.

Anti-retaliation protection

Civ Code § 1942.5 prohibits retaliation against a tenant for exercising rights under landlord-tenant law, including filing AB 1482 petitions. A retaliatory rent increase, eviction, or service reduction following protected tenant conduct is independently unlawful and exposes the landlord to actual damages and statutory penalties.

Bottom line for landlords. The cost of compliance with AB 1482 is small — get the cap right, document the calculation, serve the proper notice. The cost of getting it wrong is potentially substantial: refunds of unlawful overages, defenses to unlawful detainer, attorney’s fees, and reputational exposure. The form on this page handles the mechanics.

California statute reference table

California statute citations are to the Civil Code, Code of Civil Procedure, and Penal Code as currently in effect. Local ordinances may layer additional requirements on top of state law and should be consulted independently.

Frequently asked questions

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This form and the accompanying guidance are provided for general informational purposes only and do not constitute legal advice. California landlord-tenant law has technical requirements that change with legislation, regulation, and case law. AB 1482 and Civ Code § 1947.12 depend on facts and case-specific circumstances — including regional CPI, local rent ordinances, and exemption notices — that this general guidance cannot fully address. Always verify current requirements with the California Civil Code as currently in effect, the applicable local rent board, and a qualified California landlord-tenant attorney before relying on this notice in any contested rent-increase situation. Review CA rent increase laws.