A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Westlake Village, CA
Adding an ADU, converting a garage, or building a home addition in Westlake Village means working with hilly lots, view-sensitive design rules, and homes built mostly between the 1970s and 1990s. The city’s strict design guidelines often push ADUs into lower levels or tucked into slopes so neighbors keep their sightlines and the oaks stay untouched. We approach every Westlake Village project with a written price before any work starts, background-checked crews, and the 365-Day Done Right Promise behind the finished build. Call us at (805) 309-3462 to talk through your lot.
Why Westlake Village Homes Are Different
Westlake Village lots tend to be larger than what you find in nearby Conejo Valley cities, and many of them slope. That changes where an ADU can sit, how drainage gets handled, and what the foundation work looks like. Homes from the 1970s through 1990s often have stucco or wood siding with tile roofs, so matching materials matters when we tie a new structure into an existing one.
The climate here is mild Mediterranean: warm, dry summers and cool, wet winters. Good insulation and passive cooling keep ADUs comfortable through August, while winter rains make hillside drainage and waterproofing a real part of the plan. We also work around HOA and CC&R requirements in some of Westlake Village’s gated communities. Those rules can affect ADU placement and size, and we handle that paperwork early so it never surprises you mid-build.
North Ranch is a good example. Many homes there back onto open space or golf courses, and rear yards are expansive. Placing an ADU along a side property line is a common strategy there because it preserves usable outdoor space and keeps neighbor privacy intact. Every lot is different, and we design for the specific one you own.
Our Main Westlake Village Services
Most Westlake Village homeowners call us about one of three things: adding square footage to the main house, turning an underused garage into living space, or building a detached ADU in the yard. Here is what each involves locally.
Home Addition Contractor in Westlake Village
A home addition in Westlake Village often means expanding a primary suite, adding a family room, or building out a kitchen. Because many lots slope, the foundation plan has to account for grade changes, and we match rooflines and stucco or wood siding so the new section looks like it was always there. Bedrooms near the work zone stay livable; our crews use quiet tools and respect school-hour schedules. Learn more on our Home Addition Contractor in Westlake Village page, including what a written quote covers.
Garage Conversion Contractor in Westlake Village
Garage conversions in Westlake Village turn existing square footage into a studio, office, or in-law suite without expanding the footprint. That matters in neighborhoods with CC&Rs that restrict new structures. We handle insulation for summer heat, add proper egress windows, and upgrade electrical panels where the new space needs it. The crew keeps drop cloths down and floors clean daily. See the full scope on our Garage Conversion Contractor in Westlake Village page.
ADU Builders in Westlake Village
Detached ADUs in Westlake Village work well on large or sloped lots, particularly where design guidelines favor keeping the unit below the main home’s sightline. We build stick-frame and prefab ADUs, and we will help you evaluate options like Abodu, Cover, or Tuff Shed for your specific yard. Drainage, passive cooling, and neighbor privacy all come into the plan. Details, timelines, and pricing examples are on our ADU Builders in Westlake Village page.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Westlake Village
We work hands-on with several brands Westlake Village buyers research before calling, including Abodu, Cover, Tuff Shed, and James Hardie materials. Parts and samples are coordinated locally, and we walk you through what each product actually looks like on your lot. More detail lives on our brands page.
Pricing for ADU Company in Westlake Village, CA
Pricing in Westlake Village is shaped by lot slope, foundation work, and the finish level you choose. The ranges below reflect what we typically see for the main services we provide here. Every project gets a written price before any work begins, no exceptions.
| Service | Typical range in Westlake Village |
|---|---|
| Detached ADU (1-bed, stick-frame) | $180,000 – $260,000 |
| Detached ADU (1-bed, prefab) | $140,000 – $220,000 |
| Detached ADU (2-bed, stick-frame) | $240,000 – $350,000 |
| Garage conversion to ADU (studio) | $95,000 – $150,000 |
| Garage conversion to ADU (1-bed) | $120,000 – $190,000 |
| Home addition (primary suite) | $160,000 – $250,000 |
| Home addition (family room) | $120,000 – $200,000 |
| Home addition (kitchen expansion) | $140,000 – $230,000 |
| Sloped-lot foundation surcharge | $15,000 – $50,000 |
Sloped lots drive foundation and drainage costs up more than almost anything else in Westlake Village, and some gated communities add review time and design constraints that affect the finish budget. You will see your exact number in writing before crews arrive. Nothing gets added later that was not in the quote.
Neighborhoods We Serve in Westlake Village
We work across all of Westlake Village, including the hillside and open-space-adjacent lots where design and drainage need the most attention. Scheduling is coordinated from our Los Angeles office, with crews serving Westlake Village locally and response times matched to each project’s start date, not to a neighborhood map.
- North Ranch
- First Neighborhood
- Westlake Hills
- Three Springs
- Westlake Trails
Service Area – Cities Near Westlake Village
We serve Westlake Village and the surrounding Conejo Valley communities. Homeowners in Thousand Oaks, CA, Agoura Hills, CA, Oak Park, CA, and Calabasas, CA reach us for the same written pricing and Care Promise we bring to every Westlake Village project.
Serving Westlake Village, CA - Our Local Coverage Area
We’re based in the Westlake Village area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About ADU Company in Westlake Village
Yes, in many cases. Westlake Village’s design guidelines emphasize preserving sightlines, oak trees, and the area’s low-density feel. On view-sensitive lots, ADUs are often pushed to lower levels or tucked into slopes. We review your specific lot’s constraints before any design work begins.
Some gated communities in Westlake Village have CC&Rs that limit ADU size, placement, or exterior finishes. We identify those restrictions early and design around them, so you are not surprised by a board rejection after plans are drawn. Call (805) 309-3462 and we will help you sort it out.
Sloped lots require grading, retaining walls, and drainage planning before foundation work. We factor all of that into your written price up front, and crews protect existing landscaping during the work. The Cedarwell Care Promise applies on hillside jobs the same as flat lots: shoe covers, drop cloths, a clean-up photo before the crew leaves.
If you are planning an ADU, garage conversion, or home addition in Westlake Village, call (805) 309-3462 for a free estimate. You will get a written price, a clear plan for your lot, and a crew that treats your home like it matters, because it does.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Westlake Village Customers Say
"Quality ADU. Communication was good overall, with one quiet stretch during the inspection wait where I had to check in. Once moving again they were tidy and quick to finish."
- Noelle Friedman"Garage to studio conversion with us living right there. They sealed off the dust, cleaned up daily, and respected our quiet hours. No surprise costs. Beautiful."
- Terrence Boylan"Added a backyard cottage. The team protected our existing landscaping and left the yard clean every evening. Gentle, respectful, and they walked us through each stage calmly."
- Tamara Welsh
