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
Fielding ADU Builders handles accessory dwelling units, garage conversions, and room additions across Westlake Village, CA. This city builds differently than most: large hillside lots, strict HOA design review, and a Mediterranean look that owners expect new work to match. Whether you’re planning a detached ADU above the lake or converting an attached garage off Lindero Canyon Road, the price goes in writing before we start, and every job is covered by the Garrison Standard for a full year. Call (805) 309-3020 to talk through your lot.
Why Westlake Village Homes Are Different
Westlake Village homes lean large and custom, most built from the 1960s forward on roomy lots with hillside or golf-course frontage. The dominant style is Spanish or Tuscan: smooth stucco, arched openings, and barrel-tile roofs. That matters for ADUs and additions because the HOA review boards here generally push new construction toward duplication, not contrast. A detached ADU that reads as a modern glass box will stall. One that repeats the roof pitch, stucco texture, and window proportions of the main house tends to move.
The terrain adds a second layer. Many lots slope, which changes foundation scope, drainage design, and how crews stage material. Dry, hot summers and cool, wet winters push homeowners toward indoor-outdoor connections: ADUs with covered patios, wide door openings, and shaded entries. Santa Ana winds show up in the fall, which is why we specify fire-resistant materials and defensible-space details on exterior work. These are not optional upgrades in Westlake Village. They are the baseline for getting a project through review and keeping it standing for decades.
Our Main Westlake Village Services
Most Westlake Village homeowners reach out about one of three things: adding square footage to the existing house, converting a garage into living space, or building a separate backyard unit. Each has its own page with pricing and process details.
Room Addition Contractor in Westlake Village
Room additions here usually extend the back or side of a hillside home, which means foundation and drainage work before framing starts. We match the existing stucco and roof profile so the addition reads as original. The written price covers everything: engineering, permits, materials, and finish work. No change orders at the door. For the full breakdown, see Room Addition Contractor in Westlake Village.
Garage Conversion Contractor in Westlake Village
A garage conversion in Westlake Village turns an underused two or three-car bay into a rental unit, an office, or an in-law suite. The structural work is usually lighter than a full addition, but the HOA and city still require drawings, permits, and inspections. We handle the entire file, including any setback questions. For pricing and the conversion process, see Garage Conversion Contractor in Westlake Village.
ADU Builders in Westlake Village
Backyard ADUs here range from prefab units set on a slab to fully custom builds with tile roofs and stucco to match the main house. We work with Abodu, Cover, and Plant Prefab when speed and fixed factory pricing make sense, and we build conventionally when the lot or the HOA calls for a custom match. For the full Westlake Village ADU picture, see ADU Builders in Westlake Village.
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 install and finish prefab ADUs from Abodu and Cover, plus conventional exteriors using James Hardie siding and Tuff Shed-style structures where the design calls for it. Parts and finish materials are sourced locally, which keeps lead times short. See our brands for the full list.
Pricing for ADU Company in Westlake Village, CA
| Service | Typical range in Westlake Village |
|---|---|
| Detached ADU (prefab, 1 bed) | $180,000 – $240,000 |
| Detached ADU (prefab, 2 bed) | $240,000 – $320,000 |
| Detached ADU (custom build, 1 bed) | $260,000 – $340,000 |
| Detached ADU (custom build, 2 bed) | $340,000 – $440,000 |
| Garage conversion (attached, 1 bed) | $110,000 – $160,000 |
| Garage conversion (attached, 2 bed) | $160,000 – $220,000 |
| Garage conversion (detached) | $180,000 – $260,000 |
| Room addition (primary suite) | $160,000 – $240,000 |
| Room addition (family room) | $120,000 – $180,000 |
| Room addition (second story) | $220,000 – $320,000 |
Hillside foundations, HOA-required design revisions, and fire-resistant exterior materials push Westlake Village projects toward the upper end of these ranges. Whatever the final number, it goes in writing before any work begins, and that written number is the number on the final invoice.
Neighborhoods We Serve in Westlake Village
We work across Westlake Village, and our crews are familiar with the HOA requirements and lot conditions in each pocket.
- First Neighborhood
- Westlake Trails
- North Ranch
- Foxmoor Hills
- Three Springs
Most Westlake Village estimates are scheduled within a few days of your call, and written proposals follow shortly after we walk the lot.
Service Area – Cities Near Westlake Village
Fielding ADU Builders also works in the surrounding Conejo Valley communities. If you are in Thousand Oaks, CA, Agoura Hills, CA, Oak Park, CA, or Calabasas, CA, the same written price policy and one-year Garrison Standard guarantee apply.
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
We schedule estimate visits in Westlake Village within a few business days of your call. Once the written proposal is approved, permitting and HOA review set the timeline more than our crew availability does. Call (805) 309-3020 to get on the schedule.
Yes, most Westlake Village neighborhoods review exterior changes through their HOA before the city issues a permit. We prepare the drawings and documentation the HOA asks for and stay on the file until the approval is in hand. The permit process is part of the written price.
We pull every permit required for the job and schedule all inspections. The written price includes permit fees and engineering, so there is no separate line for “paperwork” that shows up later. Work does not start until the permit board is posted.
If you are planning an ADU, garage conversion, or room addition in Westlake Village, call (805) 309-3020 for a free estimate and a written price before any work begins.
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
"Insulation, drywall, and finishes were all well done. Feels like part of the house."
- Pete O."Garage conversion with a new bath and kitchenette. Permit was handled by them. Inspection passed first time."
- Sheila B."Built a detached ADU behind our house. The builder is a veteran and runs the site like a platoon: schedule posted, crew on time, everything labeled. Finished within a few days of the date."
- Ken W.
