A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Camarillo, CA
Benson ADU Builders designs and builds accessory dwelling units, home additions, and room additions across Camarillo, CA, with a written price before any work begins. Camarillo’s mix of single-story mid-century homes, newer tract developments, and hillside properties means most ADU and addition jobs here involve specific grading, setback, and foundation decisions that we plan for up front. Whether you’re pricing a detached ADU in the flatlands north of the 101 or a room addition on a sloped lot off Santa Rosa Road, call (903) 568-7222 and we’ll walk you through the real numbers.
Why Camarillo Homes Are Different
Camarillo’s housing stock runs older than a lot of Ventura County buyers expect. A large share of homes east of the 101 and around Old Town were built between the late 1950s and the early 1980s, which means original electrical panels, thinner slab foundations, and rooflines that were never designed for a second story. Those conditions change how we scope an addition or ADU: we plan for panel upgrades, shear-wall retrofits, and drainage corrections before we ever hand you a price. The good news is that many of those homes sit on generous lots, so detached ADUs often fit without major variances.
The other Camarillo factor is terrain. Neighborhoods like Crestview, the hills above Adolfo Road, and pockets around Mission Oaks carry steeper grades than the flatlands near Village at the Park. On a sloped site, a prefab panel system from Dvele or Boxabl often beats a stick-built ADU on both schedule and cost per square foot, because the panels are engineered off-site and the foundation scope stays tighter. We also deal with the marine layer that rolls through in the evenings, which means our crews schedule exterior framing and stucco work around the same coastal moisture that Oxnard and Somis homeowners know well.
Our Main Camarillo Services
Most Camarillo homeowners call us for one of three projects: an ADU in the backyard, a larger home addition off the main structure, or a single room addition that adds square footage without a full remodel. Each one has its own dedicated Camarillo page with local pricing and specifics.
ADU Builders in Camarillo
Backyard ADUs are Camarillo’s most common call, and for good reason: lots are wide enough to hold a detached unit without crowding the main house. We build both site-built and prefab ADUs, working with brands like Cover and Boxabl so you can compare a panelized build against a traditional one. Camarillo setbacks along the property lines, the rear yard, and side yards all factor into what size unit your lot can legally carry, and we check those against the city’s current ADU standards before you commit to anything. See what’s involved on our ADU Builders in Camarillo page.
Home Addition Contractor in Camarillo
A full home addition in Camarillo typically means adding a master suite, extending a living area, or building out a second-story wing on a home that was originally single-level. Foundation work is the biggest variable here: some Camarillo slabs are in great shape after 40 years, and others need section replacement before framing starts. We bring in engineered plans, pull the permits, and give you a fixed written price before any concrete is poured. Get the full breakdown on our Home Addition Contractor in Camarillo page.
Room Addition Contractor in Camarillo
A single room addition, like a home office, den, or extra bedroom, is the smallest project we take on in Camarillo, and it’s also the one where a clear price matters most. These jobs usually stay under 400 square feet and can often tie into the existing roofline without a full foundation rework. That said, even a modest addition triggers the same Camarillo building permits and inspections as a larger one, and we handle all of it in the written scope. Our Room Addition Contractor in Camarillo page has the numbers.
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 Camarillo
We build with and service the leading prefab ADU brands homeowners already research on their own, including Cover, Dvele, Mighty Buildings, and Boxabl. Panels, cladding, and trim for these systems are orderable for Camarillo deliveries on standard lead times, so you’re never stuck waiting on a single custom shop. You can compare every option on our brands page before you decide.
Pricing for ADU Company in Camarillo, CA
| Service | Typical range in Camarillo |
|---|---|
| Detached ADU (prefab, 400 – 600 sq ft) | $180,000 – $260,000 |
| Detached ADU (site-built, 600 – 800 sq ft) | $220,000 – $340,000 |
| Attached ADU / garage conversion | $120,000 – $210,000 |
| JADU conversion (interior, under 500 sq ft) | $80,000 – $140,000 |
| Home addition (400 – 800 sq ft, single story) | $150,000 – $280,000 |
| Home addition (second story, partial) | $200,000 – $350,000 |
| Room addition (under 300 sq ft) | $70,000 – $130,000 |
| Room addition (300 – 500 sq ft, with bathroom) | $110,000 – $190,000 |
What pushes a Camarillo price higher is usually the lot, not the structure: sloped grades in the hills add grading and retaining costs, and older panels near Old Town often need an electrical upgrade before a new ADU can be connected. Regardless of where your lot sits, every Benson project includes a written price before work starts, so the number we agree on is the number you pay.
Neighborhoods We Serve in Camarillo
Crews cover all of Camarillo, from the flat single-story streets near Pleasant Valley and Las Posas to the newer builds in Village at the Park and Spanish Hills. We’re in these areas weekly:
- Old Town Camarillo
- Mission Oaks
- Crestview
- Village at the Park
- Spanish Hills
Most Camarillo callers can get a dispatch team out for an estimate within a few business days, with scheduling coordinated through our Los Angeles office and local crews handling the on-site work.
Service Area – Cities Near Camarillo
Beyond Camarillo, we take on ADU and addition work in the surrounding Ventura County communities, including Somis, CA, Oxnard, CA, Newbury Park, CA, and Santa Paula, CA. If you’re unsure whether your property falls inside our coverage area, call and we’ll confirm it in about a minute.
Serving Camarillo, CA - Our Local Coverage Area
We’re based in the Camarillo 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 Camarillo
We schedule initial estimate visits across Camarillo within a few business days in most cases. Once you approve a written scope and price, your project is placed into our production queue, and you’ll get a confirmed start window in writing before any work begins.
If your Camarillo home sits in an HOA-governed community, like some parts of Mission Oaks and Spanish Hills, yes: the HOA’s architectural review process runs alongside the city’s own permitting. We prepare the plans and documentation your association requires, and we’ve helped homeowners through these reviews regularly. Call (903) 568-7222 if you want us to check what your specific HOA asks for.
Every Camarillo project quote includes the full scope: plans, permits, materials, labor, and project management, written as a line-item price before you sign. The 365-Day Done Right Promise stays in effect for a full year after completion, and if any covered repair fails during that window, we’ll come back and make it right.
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 Camarillo Customers Say
"Booked a consult online and met the project manager two days later. Weekly progress updates arrived by text with photos. ADU finished on schedule."
- Hannah W."Clean, quiet crew. They respected the neighbors, kept noise to working hours, and swept the driveway every evening."
- Hope C."Communication was the best part. I always knew what was happening that week without having to ask."
- Dolly N.
