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05
State law, local ordinance, HOAs, and tenancy

Legal in LA

The legal framework for an LA ADU — California's preemptive ADU statute, LAMC implementation, HOA limits, and the rent-control questions every owner should ask before tenanting.

State statute
Gov. Code §§ 66310–66342
LA local ordinance
LAMC §12.22 A.33
Owner-occupancy
Generally not required
ordinary ADUs; qualified-buyer sale exception, JADU rules differ
Setbacks (state floor)
4 ft side/rear

California's ADU law is unusually preemptive: state statute (Government Code §§ 66310–66342) overrides most local restrictions. But the day-to-day experience is governed by local ordinance, HOA documents, and (once tenanted) the LA rent stabilization framework. Get this right at Stage 01, not at lease-up.

05.01What state law preempts

Government Code § 66315 generally prohibits a local owner-occupancy condition on an ordinary ADU; the qualified-buyer separate-sale pathway in § 66341(c)(3) is an exception. JADU occupancy depends on shared sanitation and statutory ownership exceptions (§ 66333(b)). Parking and lot-size rules have distinct conditions; verify the relevant pathway against §§ 66310–66342 and the parcel's permitting authority.

05.02HOAs and CC&Rs

Civil Code §4751 prohibits HOAs from unreasonably restricting or denying ADU construction on single-family lots. 'Reasonable' restrictions on size, exterior finish, and setbacks are still allowed — read your CC&Rs and the architectural review process before Stage 01.

05.03Rent stabilization once tenanted

ADUs in the City of LA built after 1978 are exempt from the city's Rent Stabilization Ordinance — but not from the just-cause eviction protections of state law (AB 1482, the Tenant Protection Act). Know which tenancy framework applies before signing a lease.

05.04Insurance and permitting evidence

After certificate of occupancy, notify your homeowner's insurer and add the ADU to the dwelling coverage. Keep stamped as-built plans and the CofO in the project binder — both are sale-disclosure documents in California.

From the desk

  • The four things state ADU law overrides — and the four it doesn't

    A practical read of §§ 66310–66342 for LA homeowners.

    6 min

  • AB 1482 and your ADU tenant

    Just-cause eviction, rent caps, and how the law applies to backyard units.

    5 min

  • HOA architectural review: how to win it the first time

    Document checklist and tone — derived from 40+ approved submittals.

    4 min