California Rent Increase Notice Letter

State Cap: Rent increases over 12 months for multi-family properties older than 15 years are capped at 5% plus local CPI or 10%, whichever is lower (Civ. Code § 1947.12(a)(1)). Individually owned single-family homes, owner-occupied duplexes, and newer constructions are exempt from this state cap (Civ. Code § 1947.12(d)). Stricter municipal rent control laws in cities like Los Angeles and Oakland supersede state limits.

Notice Period: 30 days before the effective date for increases of 10% or less, or 90 days before the effective date for increases exceeding 10% over 12 months (Civ. Code § 827(b)(2)-(3)).

Proof of Service: Landlords must deliver written notice by personal delivery, substituted service, posting on the property and mailing, or by mail (Civ. Code § 827(a); Code Civ. Proc. § 1162). If sent by mail to an address within California, 5 additional calendar days must be added to the required notice period before the rent increase can take effect (Code Civ. Proc. § 1013(a)).

Prohibited Acts: Landlords cannot increase rent as retaliation against tenants exercising legal rights, for discriminatory reasons under fair housing laws, or by more than 10% during a declared local or statewide emergency (Civ. Code § 12955; Gov. Code § 1942.5; Penal Code § 396(e)-(f)).