What Is the Rent Cap and Just Cause Addendum in California?

A rent cap and just cause addendum is a written notice used in California rental housing to explain whether a tenancy is covered by the state’s rent-increase limits and eviction protections. These rules come primarily from the Tenant Protection Act of 2019, often called AB 1482. The addendum does not automatically make every rental subject to the law, and local ordinances may provide stronger protections. Understanding the notice helps landlords meet disclosure requirements and helps tenants check what limits and eviction rules may apply to their home.

What the Addendum Means

In California, a rent cap and just cause addendum—sometimes called a rent cap and just cause notice—typically tells a tenant whether the rental unit is covered by AB 1482. If the state law applies, it generally limits annual rent increases and requires a legally permitted reason, or “just cause,” for ending a tenancy after the tenant has lived in the unit long enough to qualify.

The addendum is a disclosure, not a separate statewide rent-control program. It does not set one fixed rent amount, guarantee that rent will never rise, or give a landlord permission to evict a tenant for any reason. The exact protections depend on coverage, local laws, the tenancy’s history, and compliance with required procedures.

California’s Tenant Protection Act was enacted through Assembly Bill 1482. Its statewide rent-cap and just-cause provisions are scheduled to remain in effect through December 31, 2029, unless later legislation changes the law. Because state and local rules can change, tenants and property owners should verify current requirements before acting.

What the California Rent Cap Limits

For covered units, the state rent cap generally limits rent increases to 5% plus the applicable local cost-of-living change, or 10%, whichever is lower, during a 12-month period. The calculation uses the applicable Consumer Price Index (CPI) for the area. The limit is not always 10%; in many places, the permitted increase is below that ceiling.

The rent cap generally measures the total increase imposed by a landlord over a 12-month period. A landlord cannot avoid the limit by splitting one large increase into several smaller increases. The law also generally restricts increases to no more than two adjustments in a 12-month period, subject to the statute’s terms and the tenancy arrangement.

For example, if the applicable CPI change is 3%, the state formula would allow a maximum increase of 8% for the relevant period, assuming the unit is covered and no stricter local rule applies. If the CPI change were 7%, the formula would produce 12%, but the state ceiling would limit the increase to 10%. A local rent-control ordinance may impose a lower limit or different calculation.

The cap applies to rent, not necessarily to every fee or utility charge. However, labeling part of a rent increase as a fee does not automatically take it outside the law. Whether a charge is lawful can depend on its purpose, the lease, local regulations, and whether it is effectively an increase in rent.

Which Rentals May Be Exempt From the State Rent Cap?

AB 1482 does not cover every California rental. Common statutory exemptions include certain housing types and properties, but an exemption from the state cap does not necessarily mean a landlord may raise rent without restriction. Local rent-control laws, lease terms, notice rules, and other state or federal protections may still apply.

Exemption details matter. For example, a single-family home is not automatically exempt simply because it is a house. The ownership structure and the required written notice can determine whether the statutory exemption applies. A rental’s age exemption is also based on a rolling 15-year period, not a single permanent cutoff date.

Tenants should also check whether their city or county has rent stabilization that covers housing excluded from the state law. Some local ordinances cover older buildings, certain property types, or rent increases under rules that differ from AB 1482.

What “Just Cause” Means

Just-cause protection means a landlord must state a legally recognized reason when ending a covered tenancy after the applicable qualification period. Under the state law, protections generally apply once all tenants have continuously and lawfully occupied the unit for at least 12 months. If an additional adult tenant joins the lease before the existing tenants have occupied the unit for 24 months, the timing rules can differ; in some cases, the protections apply after the household’s qualifying period reaches 24 months or the new tenant has occupied the unit for 12 months, whichever occurs first.

Not every notice to end a tenancy is an eviction, and a landlord cannot remove a tenant personally. If a tenant does not leave after a lawful notice, the landlord generally must use the court process to seek possession. Lockouts, shutting off utilities, or removing belongings without legal authority are not substitutes for that process.

At-Fault Reasons

At-fault just cause refers to conduct or circumstances attributed to the tenant. Examples in the statute include failing to pay rent, materially breaching the lease after proper notice and an opportunity to correct the issue when required, creating a nuisance, committing waste, or refusing lawful entry. Certain criminal activity may also qualify under the law’s specific conditions.

A landlord must follow the applicable notice and legal procedures. For instance, an alleged lease violation may require a notice that identifies the problem and gives the tenant an opportunity to fix it when the law requires one. A disagreement over whether conduct meets the legal standard may ultimately need to be resolved in court.

No-Fault Reasons

No-fault just cause applies when the reason is not a tenant’s alleged wrongdoing. The statute identifies circumstances such as the owner or a qualifying family member moving into the home, withdrawal of the unit from the rental market, compliance with a government order or law requiring the tenant to leave, and certain substantial renovations or demolition.

For a no-fault termination, the landlord generally must provide relocation assistance or waive the final month’s rent, subject to statutory requirements. The amount is generally equal to one month of the tenant’s rent in effect when the notice is issued. The notice must explain the tenant’s right to relocation assistance, and deadlines and eligibility details can matter.

Owner move-in rules have specific limitations. The landlord must meet the statute’s requirements concerning the intended occupant and the unit, and cannot simply use “owner move-in” as a label without actually complying. Local ordinances may impose additional restrictions, including rules about eligible relatives, notice contents, or payment amounts.

Why the Written Notice Matters

For certain properties exempt from the state rent cap and just-cause provisions—particularly qualifying single-family homes and condominiums—the landlord must provide a prescribed written notice stating that the property is exempt. Without the required notice, the landlord may be unable to rely on that exemption as intended by the statute.

When a tenancy begins or a lease is renewed, the required language may be included in the rental agreement or provided as a separate addendum. For a tenancy that already exists, the landlord may need to deliver the notice separately. The exact notice method and timing depend on the statute, the tenancy, and any local requirements.

The notice should not be treated as conclusive proof that a rental is covered or exempt. A mistake in a form does not necessarily change the property’s legal status, and a tenant’s rights may depend on facts beyond the document. Relevant details can include the building’s age, ownership, local law, the lease, and when occupants moved in.

State Rules Versus Local Rent Control

California cities and counties may have rent-control or just-cause ordinances that are stricter than AB 1482. A local rule may set a lower annual increase, cover a different range of buildings, require a local registration, or provide additional protections against eviction. State law generally allows stronger local protections to remain in place, subject to legal exceptions.

As a result, the state formula is not always the final answer. A tenant in a city with rent stabilization should check the local housing department’s current rules and whether the unit is covered. Property owners should likewise confirm whether local notices, registration, relocation payments, or procedural steps apply in addition to the state addendum.

Federal programs and other state laws can also affect a tenancy. Subsidized housing, mobile homes, and specialized housing arrangements may be governed by additional rules. A landlord should not assume that an exemption from AB 1482 removes every other legal limit.

How Tenants Can Review an Addendum

• Check the coverage statement. Identify whether the notice says the unit is covered by AB 1482 or claims an exemption.
• Confirm the property details. Review the building’s construction or occupancy date, property type, and ownership information when relevant.
• Look for the required exemption language. A qualifying single-family home or condominium exemption generally requires written disclosure.
• Compare the rent increase with the right rule. Check the applicable CPI calculation, the 12-month period, and any local rent cap.
• Keep records. Save the lease, addendum, rent notices, payment history, and written communications.
• Ask a local housing agency or legal aid organization. Local agencies can explain city or county rules; legal advice may be useful when a notice or eviction is disputed.

How Landlords Can Use the Addendum Responsibly

Landlords should determine coverage before preparing the lease, rather than relying on a generic form. They should use current statutory language, confirm whether the property qualifies for an exemption, and deliver the disclosure in the required manner. A form should accurately describe the unit’s status and should not imply that an exemption overrides local law.

Before raising rent, a landlord should check the applicable state or local limit, calculate the increase over the relevant 12-month period, and provide the legally required written notice. Before ending a tenancy, the landlord should identify the correct just-cause category, provide the proper notice, and meet any relocation or procedural obligations.

Because the law includes exceptions and technical notice requirements, a real estate attorney or qualified housing professional can help assess uncertain cases. A rent cap and just cause addendum is an important disclosure, but it is only one part of a lawful rental relationship.

Reliable Sources for California Rental Rules

The primary state-law reference is California Civil Code Section 1946.2, which addresses just cause for termination, and California Civil Code Section 1947.12, which addresses rent increases. The California Department of Justice landlord-tenant information provides additional consumer guidance. Local housing departments should be consulted for city and county rules.