Westside · FAQ

Westside ADU questions, answered

Questions we get on almost every Westside site walk. If yours isn't here, ask us — we answer everything before you commit.

Do I need a Coastal Development Permit for a Westside ADU?

Only if the parcel is inside the Coastal Zone — generally west of Lincoln Blvd in Venice and the Marina Peninsula. Inland Westside parcels (most of Santa Monica, Brentwood, Mar Vista east of Lincoln) do not.

Can I build an ADU in Santa Monica's R1?

Yes. SMMC §9.31.300 mirrors state ADU law on R1, R2, and multifamily lots, with ministerial 60-day review once the submittal is complete.

How does the soft-story retrofit ordinance affect my ADU project?

If your existing building is on the LA or Santa Monica soft-story list, the city often requires the retrofit to be permitted alongside the ADU. We coordinate both packages to keep one inspection schedule.

Will my Westside ADU rent for enough to justify the cost?

Comparable detached studios and 1BRs in Santa Monica, Venice, and Mar Vista rent in the $2.6k–$4.2k range. Conversions hit positive cash flow faster; new detached builds underwrite on appreciation plus rent.

Are there parking requirements?

State law removes parking requirements within ½ mile of major transit. The Expo Line and major Metro stops cover most of the Westside, so parking is rarely required for an ADU here.

Reference

Terms and guides for this page

Glossary terms

Ministerial Review
Permit review based purely on objective standards — no public hearing, no discretion.
Coastal Development Permit (CDP)
Permit required for construction inside California's Coastal Zone, issued by the city or the California Coastal Commission.
LADBS (LA Department of Building and Safety)
The City of Los Angeles agency that issues building permits and conducts inspections.
ePlan
LADBS's fully electronic plan-check portal for residential and commercial permits.
Soft-Story Retrofit
Mandatory seismic strengthening of older multifamily buildings with weak ground floors.
ADU (Accessory Dwelling Unit)
A self-contained second home on a residential lot, with its own kitchen, bath, and entrance.

Field guides

The Los Angeles ADU permit process, step by step
Permitting an ADU inside the City of Los Angeles takes about 8–11 weeks of plan check (LADBS) plus 2–4 weeks of pre-submittal prep. State law caps ministerial review at 60 days from a complete submittal. Total city + utility fees for a 700 sqft detached ADU typically run $13,000–$26,000.