Renting in Costa Mesa: the rules that apply

Each rule below is marked Costa Mesa code or CA state law and links to the section it comes from (checked October 2026). General information, not legal advice.

CA state law Costa Mesa has no rule of its own on this, so California law applies. Rent cap right now: 8.7% for increases taking effect August 1, 2026 through July 31, 2027 (5% plus 3.7% inflation) (Civ. Code § 1947.12(a)(1), (g)). California's statewide rent cap — the full state rule →

CA state law Costa Mesa has no rule of its own on this, so California law applies. Just cause required: After 12 months of lawful occupancy, the owner may terminate only for a just cause stated in the notice (Civ. Code § 1946.2(a)). Just-cause eviction in California — the full state rule →

Also in Costa Mesa's code: Public Nuisance Abatement (§ 20-30) — public nuisance abatement cases only. This page does not summarize it yet.

CA state law Underneath, California law still applies. No-fault eviction relocation assistance: One month's rent (as relocation payment or rent waiver), paid within 15 calendar days of the notice (Civ. Code § 1946.2(d)(3)(A)). Relocation under California's just-cause law — the full state rule →

Costa Mesa code State law: 60 days' notice to end a tenancy, or 30 days if the tenant has lived there less than 1 year. City rule: after a police notice of illegal drug activity or gang-related crime, the landlord has 30 calendar days to serve notice or appeal.

All 4 Costa Mesa rules on notices, with the code text and the state law underneath →

CA state law Costa Mesa has no rule of its own on this, so California law applies. Security deposit cap: One month's rent, on top of the first month's rent (Civ. Code § 1950.5(c)(1), (c)(6)). Deposit return deadline: 21 calendar days after the tenant moves out, with an itemized statement of any deductions (Civ. Code § 1950.5(h)(1)). California security deposit law — the full state rule →

CA state law Costa Mesa has no rule of its own on this, so California law applies. Retaliation protection period: For 180 days after a tenant complains about habitability (to the landlord or an agency), the landlord may not evict, raise rent or cut services in retaliation (Civ. Code § 1942.5(a), (b)). Retaliatory eviction in California — the full state rule →

CA state law Costa Mesa has no rule of its own on this, so California law applies. Lockouts and self-help eviction banned: A landlord may not change locks, remove doors or windows, or remove the tenant's belongings to force a tenant out (Civ. Code § 789.3(b)). Utility shutoffs banned: A landlord may not cut off water, heat, electricity, gas or other utilities to force a tenant out (Civ. Code § 789.3(a)). Tenant harassment and lockouts in California — the full state rule →

CA state law Costa Mesa has no rule of its own on this, so California law applies. Duty to keep the unit habitable: The landlord must deliver a unit fit to live in and repair conditions that make it untenantable (Civ. Code § 1941). Repair and deduct: A tenant may make a repair the landlord neglects and deduct the cost from rent, up to one month's rent, no more than twice in any 12 months (Civ. Code § 1942(a)). Habitability and repair-and-deduct — the full state rule →

CA state law Costa Mesa has no rule of its own on this, so California law applies. Landlord entry notice: Reasonable written notice, presumed to be 24 hours, and entry only during normal business hours (Civ. Code § 1954(d)(1), (e)). Landlord entry notice in California — the full state rule →

Costa Mesa's code also has these chapters. We have not summarized their values on this page yet; read them in the library.

• Public Nuisance Abatement (§ 20-30) — public nuisance abatement cases only