ADU builder · West Hills, Los Angeles
ADU builder in West Hills.
Design, permits, financing and construction from one local team. 600+ ADUs delivered across greater LA, including nearby Van Nuys, Los Angeles & Lake View Terrace.
Licensed & insured · Construction from $275/sq ft · 5.0★ rated
Building an ADU in West Hills
West Hills sits at the far west edge of the San Fernando Valley, below the Simi Hills, and it's mostly single-family homes. On many of these lots the garage is the easiest place to start. It already has a slab, walls and a roof, so a garage conversion often costs less than building new. Where the lot has room, a detached ADU in the backyard is the other common choice. West Hills shares a planning area with Canoga Park, Winnetka and Woodland Hills, and ADU permits there rose from about 696 in 2023 to about 976 in 2025, per state housing reports.
ADU Resource Center designs, permits and builds ADUs with one in-house team. Our closest completed projects to West Hills are in Los Angeles and Van Nuys. One is a 728 sq ft, two-bedroom, two-bath Mediterranean ADU the owners built to rent out. Another is a poolside studio with skylights and a deck. For the neighborhood next door, see our Woodland Hills page.
We give you a fixed quote before any construction, and a single project manager handles your job from the first drawing to final inspection. We can also help with financing.
ADUs in West Hills: quick facts
Updated November 2026
- Who issues ADU permits
- City of Los Angeles: LADBS (Department of Building and Safety)
- Our construction rates
- $275, $300 or $325 per sq ft (basic, mid-range, luxury); garage conversions $235–$285 per sq ft
- Example cost
- A 600 sq ft one-bedroom runs about $165K–$195K in construction
- Size limits under state law
- Detached ADUs up to 1,200 sq ft on many lots; junior ADUs up to 500 sq ft inside the home
- Permit decision
- State law requires a decision within 60 days of a complete application
- Who builds it
- ADU Resource Center: design, permits and construction by one team, 600+ ADUs delivered, office in Glendale
ADU rules change. We confirm the current rules for your lot on the free consultation.
Real projects nearby
ADUs we've built near West Hills.
Hear it from our clients
Homeowners on building their ADU with us
More stories on our testimonials page.
Local know-how
What to know before building in West Hills.
Garage conversion pricing
Conversions are built at $235, $260 or $285 per sq ft depending on finishes, and a typical two-car garage comes to about $95K–$125K. Our garage conversion cost page explains what goes into that number.
Check the garage first
A conversion doesn't need new setbacks for the existing structure, so the price mostly depends on the garage's condition. Cracked slabs, old wiring or missing insulation add work, and we inspect all of it on the site visit.
LADBS and Standard Plans
West Hills is part of the City of LA, so permits come from LADBS. If you'd rather build new, LA's Standard Plan program has pre-approved detached designs.
Hillside streets and fire rules
Parts of West Hills fall in LAFD's very high fire hazard severity zone, mostly on the hillside streets. Building there means ignition-resistant roofing, vents and siding, and sloped pads can need extra foundation work.
What it costs
ADU cost in West Hills
We build at a flat rate per square foot: $275 (basic), $300 (mid-range) and $325 (luxury) finishes. Here's what that means for common sizes. Construction only; design, permits and city fees are quoted separately on your consultation.
| ADU size | Basic | Mid-range | Luxury |
|---|---|---|---|
| 400 sq ft studio | ~$110K | ~$120K | ~$130K |
| 600 sq ft 1-bedroom | ~$165K | ~$180K | ~$195K |
| 800 sq ft 2-bedroom | ~$220K | ~$240K | ~$260K |
| 1,000 sq ft 2–3 bedroom | ~$275K | ~$300K | ~$325K |
Get a number for your exact size: ADU cost calculator · Browse ADU floor plans · Converting a garage? See garage conversion cost.
Free consultation
Start your West Hills ADU.
Tell us about your property. We'll confirm what's buildable, give you a real price range and walk through financing within 1 business day.
Questions
West Hills ADU questions, answered.
Still have a question? Ask us during your free consultation.
Can I turn my garage into an ADU in West Hills?
In many cases, yes. West Hills is in the City of Los Angeles, and state law lets you convert an existing garage without meeting new setbacks for the structure that's already there. Before you commit, we check the slab, framing and electrical, because an older garage sometimes needs that work to become legal living space.
What does a garage conversion cost in West Hills?
Garage conversions have their own flat construction rates: $235, $260 or $285 per sq ft for basic, mid-range or luxury finishes. A typical two-car garage of 400 to 480 sq ft lands at about $95K–$125K. Foundation repairs or a new electrical panel can change the fixed quote, and we price those before you sign.
Should I convert the garage or build a new detached ADU?
A conversion reuses the slab, walls and roof, so it usually costs less per square foot. A new detached unit costs more ($275 to $325 per sq ft to build) but can be larger, up to 1,200 sq ft on many lots under state law, and keeps your garage. We price both for your lot so you can compare.
Who issues ADU permits in West Hills?
LADBS, the City of Los Angeles Department of Building and Safety. We prepare the drawings, submit them, answer the plan-check corrections and pull the permits. The city must act on a complete application within 60 days.
How does ADU construction work with your team?
The same company that designs your ADU builds it, so the crew works from drawings our own team prepared. One project manager is your contact from the start of design until final inspection. Your schedule depends on the lot and on plan check, and we walk through it for your project on the consultation.
Free consultation
Ready to build your ADU in West Hills?
Tell us about your property and we'll confirm what's buildable, give you a real price range and lay out financing on one free call.
