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Western San Fernando Valley · LA County

ADU permits in Westlake Village

Zip codes:9136191362

Westlake Village (LA County) is a small independent city of about 8,400 people at the far western edge of Los Angeles County, on the south side of the 101 freeway between Agoura Hills and the Ventura County line. (The larger half of the master-planned Westlake Village community is across the line in Ventura County's Thousand Oaks.) It runs its own small planning and building office, with services largely contracted to outside firms. Most of the LA County portion sits in the Very High Fire Hazard Severity Zone (VHFHSZ).

Independent city — not LADBS

Westlake Village runs its own building department. Permits go through Westlake Village Planning + Building Division ↗, not the Los Angeles Department of Building and Safety (LADBS). Our address checker pulls real zoning + overlay data for any Los Angeles County address. The Westlake Village ordinance breakdown below covers the city-specific permit path.

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Westlake Village by the numbers

Rounded figures from the 2020 US Census, LA County Assessor parcel data, and the city's own published reports. Estimates only — your specific lot can vary widely.

Population

8,400

2020 Census

Single-family homes

~2,900

LA County Assessor

Median lot size

8,500 sqft

Approximate

Median home value

$1.8M

Zillow / Redfin

What makes Westlake Village different

Westlake Village's ADU ordinance is in Westlake Village Municipal Code Title 8. The city is small enough that planning + building services are largely contracted to outside firms. Most parcels sit in the VHFHSZ. The private Westlake Lake (homeowner-association-controlled) anchors the city geographically.

Westlake Village ADU ordinance — the rules that apply

Last verified: 2026-05-12

The current ADU rules in Westlake Village, sourced from the city's published ordinance and verified against CA Government Code §65852.2 (which preempts local rules stricter than state baselines). When you see "state default," that means the city can't reduce below this number under state law.

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)

VHFHSZ construction

Class A roofing + ember-resistant venting + fire-rated assemblies

Most of the city.

Westlake Lake HOA design review

Lake-adjacent parcels face HOA architectural review on top of city review

Affects a meaningful share of the city's housing stock.

Local processing time

75-90 days typical (small city, contracted plan check)

Pre-approved standard plans

None city-specific

Source: Westlake Village Planning + Building Division ↗

Active overlays + extra rules in Westlake Village

City overlays + state-level designations that hit a meaningful share of Westlake Village parcels. Each affects what you can build, how long it takes, or how much it costs.

Very High Fire Hazard Severity Zone (VHFHSZ)

~75% of parcels

Most of LA County Westlake Village. Chapter 7A construction required.

Westlake Lake HOA architectural review

~30% of parcels

Lake-adjacent parcels face HOA review for design + materials compatibility on top of city review.

Hillside area

~40% of parcels

Slopes over 10% trigger geotech + grading limits.

Watch-outs specific to Westlake Village

Patterns we see across Westlake VillageADU permits. None are dealbreakers — they're just the things people get wrong most often.

  1. 01

    Westlake Lake HOA design review is in addition to city review

    If your lot fronts or has access rights to Westlake Lake, you'll go through both city permit review AND the Westlake Lake Homeowners' Association (HOA) architectural review. Worth scoping the HOA process before drafting plans.

  2. 02

    Small civic office means longer plan check

    Westlake Village's planning + building services are largely contracted. Plan check timelines run 75-90 days — longer than the larger neighboring cities (Calabasas, Agoura). Plan accordingly.

  3. 03

    Las Virgenes Unified school fees apply

    Las Virgenes Unified School District (LVUSD) — same as Calabasas, Hidden Hills, and Agoura Hills — charges school facility fees on ADUs over 500 sqft.

Need a person, not a wizard?

Routes that fit Westlake Village

Based on what we know about Westlake Village, these are the lead types that usually make sense here. Pick whichever fits your situation. All free, no obligation.

Complex permit context

Request a Westlake Village permit referral

Coastal, hillside, historic, fire-zone, or multi-overlay parcels in Westlake Village 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 Westlake Village projects.

Permit types I'm thinking about

We don't sell your details. No obligation, no fee from us.

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.

We don't sell your details. No obligation, no fee from us.

Plans that fit Westlake Village lots

Westlake Villagedoesn't maintain a city-specific pre-approved plan library the way the Los Angeles Department of Building and Safety (LADBS) does. California Department of Housing and Community Development (HCD)-approved prefab (which bypasses local plan check) and custom designer plans are the main paths:

Connect Homes

ADU14 · ADU15

HCD-certified — skips local plan check.

View Connect Homes →

Cover

ADU77 · ADU78 · ADU79

HCD-certified — skips local plan check.

View Cover →

Amenities + civic services in Westlake Village

Parks, libraries, and the school district that serve the area. Context that matters for renter appeal, family relocation, and long-term resale.

Parks + sports

Berniece Bennett Park

Triunfo Canyon Road

Westlake Village's main park. Sports facilities, picnic, playground.

  • Baseball
  • Soccer
  • Basketball
  • Playground
  • Picnic

Westlake Lake

Central Westlake Village

150-acre private homeowner-association lake. Anchors the city geographically; lake access via HOA membership.

Private homeowner-association lake

  • Fishing
  • Trails

Triunfo Community Park

Triunfo Canyon

Neighborhood park with playground + picnic.

  • Playground
  • Picnic

Libraries

  • Agoura Hills Library (nearest)

    LA County Library

    Thousand Oaks Boulevard, Agoura Hills

    Westlake Village does not have its own library branch. Closest is the LA County Library branch in adjacent Agoura Hills.

Public schools

School assignments vary by exact address. The district + notable schools below cover most of the area.

District

Las Virgenes Unified School District (LVUSD)

Notable schools in the area

  • Westlake High School (LVUSD)
  • Colina Middle School

LVUSD serves Westlake Village + Calabasas + Hidden Hills + Agoura Hills. Top-performing public district.

Getting around Westlake Village

Car-dependent. Limited bus service; no rail.

Transit + walkability

Bus lines

  • Metro 161 (Topanga Canyon to Westlake Village) — limited

Walkability

Almost entirely car-dependent.

Nearby airports

Distance + type for each major Los Angeles-area airport reachable from Westlake Village. Useful for travel, commute, and any flight-path noise concerns on specific parcels.

  • Camarillo Airport (CMA)

    ~12 mi

    General aviation

  • Van Nuys Airport (VNY)

    ~18 mi

    General aviation

  • Hollywood Burbank Airport (BUR)

    ~24 mi

    Regional / domestic

  • Los Angeles International (LAX)

    ~33 mi

    International

Community + landmarks in Westlake Village

Annual events, landmarks, and the places that anchor the area's identity. Context for renter appeal and long-term resale.

Annual events

  • Westlake Village Concerts in the Park

    Summer Sundays

    Free outdoor concerts at Berniece Bennett Park.

    Source ↗

  • Westlake Village Tree Lighting

    Early December

    Annual community tree-lighting ceremony at the Civic Center.

    Source ↗

What makes Westlake Village Westlake Village

Private lake

Westlake Lake

150-acre homeowner-association lake — the geographic and social heart of the master-planned community.

Open-air shopping

The Promenade at Westlake

Open-air shopping + dining center on Westlake Boulevard.

Reservoir + open space

Las Virgenes Reservoir (adjacent)

Drinking-water reservoir + hiking access just west of Westlake Village.

Nearby areas to Westlake Village

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.

Independent city

Agoura Hills →

Large hillside lots and adjacency to the Santa Monica Mountains support strong Accessory Dwelling Unit (ADU) economics, but near-universal Very High Fire Hazard Severity Zone (VHFHSZ) coverage and hillside grading rules add real construction cost.

Independent city

Calabasas →

Large lots and high home values make Calabasas an attractive Accessory Dwelling Unit (ADU) market, but Very High Fire Hazard Severity Zone (VHFHSZ) rules and hillside-area restrictions add meaningful cost compared to flat-lot City of Los Angeles builds.

Independent city

Hidden Hills →

Among the most exclusive cities in Los Angeles County. Premium single-family equestrian lots support strong Accessory Dwelling Unit (ADU) economics, but the gated-private nature of the city, conservation overlays, and Very High Fire Hazard Severity Zone (VHFHSZ) rules add real procedural complexity.

Frequently asked questions about Westlake Village ADUs

›Can I build an ADU in Westlake Village?

Yes. Westlake Village allows ADUs under its local ordinance, aligned with California Government Code §65852.2 (the state baseline that preempts overly-strict local rules). Most single-family lots can host one ADU plus one JADU. Permits go through Westlake Village Planning + Building Division, not LADBS — see the ordinance table above for the specific rules.

›How does Westlake Village differ from LA City for ADU permits?

Three main differences: the permit agency (Westlake Village Planning + Building Division vs. LADBS), the local ordinance details (each city has some flexibility above the state baseline), and the timeline (some cities are faster, some slower than LA's 60-day plan check). See the ordinance breakdown above for the specifics on each.

›How much does it cost to build an ADU in Westlake Village?

Median home value in Westlake Village is around $1.8M, which usually means lot economics support a quality ADU build of $200K–$400K all-in. Hillside, coastal, or VHFHSZ lots add 7–25% on top. HCD-prefab units (Connect Homes, Cover, Plant Prefab) bypass local plan check entirely and typically run $190K–$350K turnkey.

›Does Westlake Village have pre-approved standard plans like LA's YOU-ADU?

No. Unlike LADBS, Westlake Village does not maintain a city-specific pre-approved plan library. The two faster paths are an HCD-approved prefab (factory-certified, skips local plan check) or a custom designer drawing for your lot. The slower path is a fully custom architect-led design.

›Will the PermitPathLA wizard work for my Westlake Village address?

Yes. The wizard pulls real zoning, overlay, and parcel data for any Los Angeles County address, including Westlake Village. What you'll see today: feasibility for your specific lot, the overlays that apply, and a routing summary pointing at Westlake Village Planning + Building Division for the permit submittal. Deeper Westlake Village-specific permit walkthroughs are next on the roadmap as we expand from LADBS into the independent-city ordinances.

Ready to see what your Westlake Village lot can do?

Our free address checker pulls real zoning, overlay, and parcel data for any Los Angeles County address — including Westlake Village. Start there and we'll surface what applies to your specific lot.

Check your address →

Reviewed by , Founder, PermitPathLA. California DRE-licensed broker with 30+ years of Los Angeles real estate and mortgage industry experience.

Westlake Village ordinance data last reviewed .

See an error or stale rule? corrections@permitpath.la

Primary sources: Westlake Village planning · Westlake Village Planning + Building Division permits