Westside · LA County (Unincorporated)
ADU permits in Marina del Rey
Zip codes:90292
Marina del Rey is an unincorporated coastal community of about 8,800 people on the Westside, between Venice and the Los Angeles International Airport (LAX). It is not a city — building permits run through LA County Public Works (Building & Safety) under LA County Code Title 22, plus California Coastal Act review. The community is overwhelmingly built around the world's largest manmade small-craft harbor, with a housing stock that skews heavily toward condos and townhouses rather than single-family residential.
Unincorporated LA County — not LADBS
Marina del Rey is unincorporated territory. Building permits go through LA County Public Works (Building & Safety) ↗ under LA County Code Title 22, not the Los Angeles Department of Building and Safety (LADBS). Our address checker pulls real feasibility data for any LA County address; the Marina del Rey-specific permit pathway is detailed below.
Marina del Rey by the numbers
Rounded figures from the 2020 US Census, LA County Assessor parcel data, and LA County DPW permit records.
Population
8,800
2020 Census
Single-family homes
~1,400
LA County Assessor
Median lot size
4,500 sqft
Approximate
Median home value
$1.4M
Zillow / Redfin
What makes Marina del Rey different
Marina del Rey is permitted through LA County DPW. The entire community is in the California Coastal Zone, so every Accessory Dwelling Unit (ADU) build needs a Coastal Development Permit (CDP). Single-family parcels are concentrated in Silver Strand — a narrow strip on the south side of the marina. Most of Marina del Rey is condo + townhouse stock where ADUs aren't applicable in the traditional sense.
LA County ADU rules for Marina del Rey
Last verified: 2026-05-12
Current LA County rules from Title 22 of the County Code, as applied to Marina del Rey. State preemption (Gov Code §65852.2) means the county can't reduce below the state baseline — that's noted where it applies.
| Max detached ADU size | 1,200 sqft (state default) |
| Max ADU height | 16 ft / 18 ft with second-story setbacks |
| Setbacks | 4 ft side / 4 ft rear (state minimum) |
| Permitting agency | LA County Public Works (Building & Safety) via EPIC-LA |
| Coastal Development Permit (CDP) | Required for all parcels Entire area is in the Coastal Zone. CDP adds 3-9 months and $1K-$3K. |
| LAX Airport-Influence Area construction | Sound-attenuation rules apply Direct LAX flight-path coverage. |
| Single-family applicability | ADU rules apply primarily to Silver Strand SFR pockets Most Marina del Rey housing is condo / townhouse stock not eligible for traditional ADUs. |
| LA County pre-approved standard plans | Free LA County A / B / C ADU plans available |
| Local processing time | 60 days plan check; CDP runs in parallel |
Active overlays + extra rules in Marina del Rey
LA County overlays + state-level designations that hit a meaningful share of Marina del Rey parcels.
California Coastal Zone
~100% of parcelsEntire community. CDP required for every ADU.
LAX Airport-Influence Area
~100% of parcelsDirect LAX southern flight-path coverage. Sound attenuation required.
Tsunami Inundation Zone
~35% of parcelsLow-lying harbor-adjacent parcels. Foundation + utility-placement implications.
Watch-outs specific to Marina del Rey
- 01
Most Marina del Rey housing isn't eligible for traditional ADUs
Marina del Rey's housing stock is overwhelmingly condo + townhouse + apartment. Traditional detached or attached ADUs apply primarily to the Silver Strand single-family pocket. Condos can sometimes add Junior ADUs (JADUs) within the unit footprint, but this is rare and usually requires Homeowners' Association (HOA) approval on top of the LA County permit.
- 02
Coastal Development Permit + LA County permitting both required
Two separate permits with separate timelines: the building permit through LA County DPW, and the Coastal Development Permit through LA County Regional Planning. CDP is the long pole at 3-6 months.
- 03
LAX flight noise is significant
Marina del Rey sits directly under the southern LAX departure path. Sound attenuation isn't optional. The good news: doing it well makes the ADU more rentable to LAX-adjacent renters.
- 04
LAUSD school fees apply (Westside)
Marina del Rey schools are part of LAUSD. School facility fees apply on ADUs over 500 sqft.
Need a person, not a wizard?
Routes that fit Marina del Rey
Based on what we know about Marina del Rey, these are the lead types that usually make sense here. Pick whichever fits your situation. All free, no obligation.
Complex permit context
Request a Marina del Rey permit referral
Coastal, hillside, historic, fire-zone, or multi-overlay parcels in Marina del Rey usually mean a permit expediter pays for itself in saved months. We work with vetted Los Angeles permit expediters and expeditors (both spellings) who've handled Marina del Rey projects.
Complex permit context
Request a Marina del Rey permit referral
Coastal, hillside, historic, fire-zone, or multi-overlay parcels in Marina del Rey usually mean a permit expediter pays for itself in saved months. We work with vetted Los Angeles permit expediters and expeditors (both spellings) who've handled Marina del Rey projects.
Talk to our financing broker
Want someone to walk you through your options?
Our in-house broker has 30+ years in LA mortgage and ADU financing. He'll lay out HELOC, construction-to-perm, and ADU-specific products like Renofi against your situation — free, no obligation.
Talk to our financing broker
Want someone to walk you through your options?
Our in-house broker has 30+ years in LA mortgage and ADU financing. He'll lay out HELOC, construction-to-perm, and ADU-specific products like Renofi against your situation — free, no obligation.
Plans that fit Marina del Rey lots
For unincorporated Los Angeles County, the LA County A / B / C pre-approved Accessory Dwelling Unit (ADU) plans are free and usable here. California Department of Housing and Community Development (HCD)-approved prefab also bypasses local plan check entirely.
Amenities + civic services in Marina del Rey
Parks, libraries, and the school district that serve the area. Context that matters for renter appeal, family relocation, and long-term resale.
Parks + sports
Burton Chace Park
Mindanao Way, central marina
Bay-front park with picnic, walking paths, and views of the harbor. Hosts Marina del Rey Summer Concerts series.
Summer concerts series
- Amphitheater
- Trails
- Picnic
Mother's Beach (Marina Beach)
Admiralty Way, inside the harbor
Protected swim beach inside the harbor. Calm water without ocean surf.
Protected swim beach (no ocean surf)
- Playground
- Picnic
- Trails
Marvin Braude Bike Trail (Strand)
Coastal — Marina del Rey segment
Marina del Rey segment of the 22-mile Strand bike path.
- Trails
Libraries
Marina del Rey Library
LA County Library
Admiralty Way
Public schools
School assignments vary by exact address. The district + notable schools below cover most of the area.
District
Los Angeles Unified School District (LAUSD) — Westside
Notable schools in the area
- Westchester Enriched Sciences Magnets
- Coeur d'Alene Avenue Elementary (Venice)
Marina del Rey is part of LAUSD's Westside school cluster.
Getting around Marina del Rey
Walkable along the harbor + Washington Boulevard. Car-dependent inland.
Transit + walkability
Bus lines
- Metro 108 (Marina to Pico Rivera)
- Big Blue Bus Routes 3 + 14
- Culver CityBus
Nearest rail
Metro E Line — Downtown Santa Monica (about 5 mi north)
Walkability
Walkable around the harbor + Washington Boulevard. Inland blocks are more car-dependent.
Nearby airports
Distance + type for each major Los Angeles-area airport reachable from Marina del Rey. Useful for travel, commute, and any flight-path noise concerns on specific parcels.
Los Angeles International (LAX)
~3 miInternational
Direct southern LAX flight-path coverage. Closest commercial airport.
Santa Monica Airport (SMO)
~5 miGeneral aviation
Closing 2028.
Community + landmarks in Marina del Rey
Annual events, landmarks, and the places that anchor the area's identity. Context for renter appeal and long-term resale.
Annual events
Marina del Rey Fireworks
4th of July
Annual harbor fireworks display — one of the largest 4th of July events on the Westside.
Source ↗Marina del Rey Holiday Boat Parade
Mid-December
Decorated-boat parade through the harbor channels.
Source ↗Marina del Rey Triathlon
Mid-September
Annual sprint + Olympic-distance triathlon starting at the harbor.
Source ↗
What makes Marina del Rey Marina del Rey
Marina
Marina del Rey Harbor
World's largest manmade small-craft harbor with about 5,300 boat slips. Constructed 1965.
Walkable district
Fisherman's Village
New-England-style waterfront village on the south side of the harbor. Dining + shopping.
Cruises
Marina del Rey Hornblower Cruises
Major harbor cruise operator.
Nearby areas to Marina del Rey
Other Los Angeles-area pages worth a look. Each one runs different Accessory Dwelling Unit (ADU) rules depending on jurisdiction — we show you what changes when you cross a city or county line.
LA City
Venice →
Most complicated permit terrain in LA. 6-12 month timelines vs. 3-5 months elsewhere. Highest rental yields once you're done.
LA City
Westchester →
Westside permit simplicity at near-Valley prices. LMU rental premium. LAX noise mitigation the one complication.
LA City
Mar Vista →
Westside permit middle-ground — east of Lincoln is fast, west of Lincoln needs Coastal Zone approval.
Frequently asked questions about Marina del Rey ADUs
›Can I build an ADU in Marina del Rey?
Yes. Marina del Rey allows ADUs under LA County Code Title 22, aligned with California Gov Code §65852.2. Most single-family lots can host one ADU plus one JADU. Permits go through LA County Public Works (Building & Safety) — not LADBS, since Marina del Rey is unincorporated territory rather than a city.
›Why does Marina del Rey use LA County rules instead of LA City rules?
Marina del Rey is unincorporated — it's never been formally incorporated as its own city, so LA County serves as the local government. Building permits, zoning, sheriff, libraries (in many cases), and most other services run through county departments rather than city ones.
›Where do I submit my Marina del Rey ADU permit?
Online via LA County's EPIC-LA portal, or in-person at the LA County Public Works Building & Safety counter in Alhambra (900 S. Fremont Avenue). The EPIC-LA online portal handles most ADU submittals end-to-end — you rarely need to visit in person.
›How long does the ADU permit process take in Marina del Rey?
LA County DPW targets the state-required 60-day plan check for ADUs from a complete submittal. Hillside, VHFHSZ, or environmental-review parcels can extend timelines by 4–12 weeks. Marina del Rey-specific overlays may add additional time — see the watch-outs above.
›Are LA County's pre-approved ADU plans free?
Yes. LA County maintains three pre-approved standard ADU plans (Plans A, B, and C) usable in any unincorporated area, including Marina del Rey. They're free to use, similar to LADBS's YOU-ADU program. The trade-off is reduced design flexibility — but for a fast, low-cost permit path, they're the strongest option.
Ready to see what your Marina del Rey lot can do?
Our free address checker pulls real zoning, overlay, and parcel data for any Los Angeles County address — including unincorporated Marina del Rey. Start there and we'll surface what applies to your specific lot.
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