A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Ventura, CA
ADU work in Ventura is shaped by three things: hillside lots, older coastal housing stock, and a city permit office that expects the paperwork done right the first time. We build accessory dwelling units, garage conversions, and room additions here with a written price before any work starts, and every job is covered by the Garrison Standard: a one-year written guarantee. If your ADU has a workmanship defect inside that year, we return and correct it at no charge. Call (361) 315-4177 for a free estimate.
Why Ventura Homes Are Different
Ventura’s housing stock runs older than most of Southern California’s newer suburbs. Midtown and the Avenues hold bungalows from the 1920s through the 1950s, which means foundations vary, electrical panels are often undersized for an ADU’s added load, and lot drainage can be uneven. East Ventura has more 1960s and 1970s tract homes on flatter ground, where setbacks are more predictable and garage conversions move faster. The hillside neighborhoods above Ventura College present a different challenge: sloped lots trigger grading review, retaining wall checks, and sometimes a setback variance (the city’s written permission to build closer to the property line than the standard rule allows). We handle that variance paperwork with every permit set.
Coastal climate matters too. Salt air and marine fog shorten the life of exterior hardware and untreated lumber, so we spec fasteners and siding that hold up within a few miles of the ocean. Ventura’s permit office reviews ADU plans against both state ADU law and local coastal and hillside overlays, and plan check turnaround shifts with city staffing. We sequence every Ventura job around that reality. Reed Calloway oversees each project the same way: price in writing, permit by the book, site kept clean, work guaranteed for a full year.
Our Main Ventura Services
Most Ventura homeowners call us for one of two situations: adding a room to an existing house, or converting a garage into rentable or family space. Below are the three services we build in Ventura, each with its own dedicated page.
Room Addition Contractor in Ventura
A room addition in Ventura usually means extending a foundation on a lot that was never planned for more square footage. We check existing footing depth, sewer line location, and whether the addition triggers a hillside review. Ventura’s older homes often have unpermitted prior work that surfaces during plan check, so we pull original permits and square the record before we submit anything. The written price covers the full scope before demolition starts, and the one-year Garrison Standard guarantee applies to the finished addition. Details are on the Room Addition Contractor in Ventura page.
Garage Conversion Contractor in Ventura
Garage conversions in Ventura depend heavily on the age of the garage. Pre-1960 garages in Midtown and the Avenues sometimes sit on slabs too thin for habitable space, so we cut and repour or reinforce. Later garages on East Ventura lots often convert more directly, provided the lot retains its parking requirement. Ventura enforces its own interpretation of state ADU parking exemptions, and we confirm that with the city in writing before the estimate is final. See the Garage Conversion Contractor in Ventura page for the full conversion scope.
ADU Builders in Ventura
Backyard ADUs in Ventura range from compact one-bedroom units to two-story family quarters, depending on lot size and hillside slope. We build conventional stick-frame ADUs with James Hardie siding and also run prefab and modular options from platforms we know well, which can shorten on-site construction time on accessible lots. Every Ventura ADU gets a written price before any work starts and the same 365-day guarantee as every other project we build. More on the ADU Builders in Ventura 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 Ventura
We work with the prefab and modular platforms Ventura homeowners research most, including Abodu, Cover, and Dvele, alongside conventional builds with James Hardie siding. Each platform has its own permitting path, and we handle that coordination so the unit you approve is the unit the city signs off. See our brands for the full list.
Pricing for ADU Company in Ventura, CA
| Service | Typical range in Ventura |
|---|---|
| Room addition (300 – 400 sq ft) | $90,000 – $140,000 |
| Room addition (400 – 600 sq ft) | $140,000 – $200,000 |
| Garage conversion (studio, 280 – 400 sq ft) | $70,000 – $110,000 |
| Garage conversion (1-bedroom, 400 – 600 sq ft) | $110,000 – $160,000 |
| Backyard ADU (studio, 300 – 500 sq ft) | $120,000 – $190,000 |
| Backyard ADU (1-bedroom, 500 – 700 sq ft) | $190,000 – $270,000 |
| Backyard ADU (2-bedroom, 700 – 1,000 sq ft) | $270,000 – $380,000 |
| James Hardie siding (full exterior) | $14,000 – $28,000 |
Hillside lots push the price up in Ventura: grading, retaining walls, and deeper footings add real cost, and the city requires engineered plans review for sloped sites. Prefab and modular ADUs can shift the price down on accessible flat lots, but the permit path still runs through the same coastal and hillside overlays. Whatever the number is, you get it in writing before any work starts, and that written price is the price on the final invoice.
Neighborhoods We Serve in Ventura
We work across Ventura’s housing stock, from the prewar bungalows of Midtown and the Avenues to the tract homes of East Ventura and the hillside lots above Ventura College and along Foothill Road. Scheduling in most Ventura neighborhoods runs on a two-week window for the initial site visit and estimate.
- Midtown Ventura
- The Avenues
- East Ventura
- Ventura College hillsides
- Poinsettia Heights
Service Area – Cities Near Ventura
From Ventura, our crews also cover the surrounding communities. We take ADU, garage conversion, and room addition work in Oak View, CA, Ojai, CA, Oxnard, CA, and Port Hueneme, CA. Each city has its own permit path, and we handle that coordination the same way we do in Ventura: written price first, permits by the book, one-year written guarantee.
Serving Ventura, CA - Our Local Coverage Area
We’re based in the Ventura 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 Ventura
Our Ventura scheduling runs on about a two-week window from your call to the site visit. We coordinate from our Los Angeles dispatch office, and our crews serve Ventura locally. Call (361) 315-4177 and a live person will set the estimate on the spot.
Yes. We prepare and submit the full permit set to the City of Ventura, handle plan check corrections, and pull the approved permits before construction starts. Coastal and hillside overlays add review steps, and we manage that paperwork as part of the written scope.
No. The price you approve in writing before any work starts is the price on the final invoice. If Ventura’s city review requires a scope change you did not approve, we bring it to you in writing before any added cost. Call (361) 315-4177 to schedule your free estimate.
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 Ventura Customers Say
"Room addition over the back patio. Framing is square, windows are tight, and the roofline matches."
- Danny L."Foundation and slab poured on schedule. Crew kept the yard orderly."
- Marian J."Garage conversion with a new bath and kitchenette. Permit was handled by them. Inspection passed first time."
- Sheila B.
