A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Newbury Park, CA
Adding an ADU, a room addition, or a full home addition in Newbury Park means working with a specific kind of housing stock: homes built from the 1960s through the 1990s, often on larger lots along the Conejo Valley floor or tucked into the foothill terraces off Reino Road and Ventu Park Road. The terrain varies enough that setbacks, drainage, and utility routing change from street to street, which is why a written price based on your actual site matters more than a generic estimate. We’re Sutton ADU Builders, part of the Threshold Group, and every Newbury Park project starts with the same commitment: a fixed, written price before any tools come off the truck. Call (472) 248-8213 to schedule a free estimate.
Why Newbury Park Homes Are Different
Newbury Park sits in the westernmost stretch of Thousand Oaks, where the Conejo Grade meets the Santa Monica Mountains. That geography does two things to an ADU project. First, many lots slope, which changes how we grade, where we place the structure, and how we handle stormwater. Second, the soil in parts of Newbury Park includes expansive clay, so foundation work often needs a soils report before we pour. Homes in the older pocket near Newbury Road and Kelley Road tend to have mature trees and tighter side yards, which means a detached ADU may need careful placement to respect a setback (the required gap between your new structure and the property line). Newer subdivisions around via Las Brisas and the Dos Vientos area often carry HOA architectural requirements on top of city permits, and that review can add a few weeks to the timeline. It’s not friction. It’s just how Newbury Park works, and we plan for it from day one.
Our Main Newbury Park Services
These three projects account for most of the calls we take from Newbury Park homeowners:
Home Addition Contractor in Newbury Park
A home addition in Newbury Park usually means extending the footprint of an existing single-family house, often to add a primary suite, a larger kitchen, or a second living area. The work touches foundation, framing, roofing, and finishes as one continuous job. On hilly Newbury Park lots, we pay close attention to how the new roofline ties into the old one, because the junction is where wind-driven rain finds its way in. Home Addition Contractor in Newbury Park.
ADU Builders in Newbury Park
A detached ADU (accessory dwelling unit) is a separate, self-contained home built behind or beside the main house, typically 400 to 1,200 square feet. Newbury Park’s larger lots are well suited to them, especially where a side or rear yard is underused. Permitting follows California state ADU law, but local fire access and hillside rules still apply. ADU Builders in Newbury Park.
Room Addition Contractor in Newbury Park
A room addition is smaller in scope than a full home addition: a single bedroom, a home office, a sunroom, or a larger bathroom bumped out into existing yard space. In Newbury Park, we see a lot of these on 1970s single-story ranches where the original floor plan doesn’t include a dedicated home workspace. The job moves faster than a whole-house addition, but it still pulls the same permit types. Room Addition Contractor in Newbury Park.
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 Newbury Park
We work with prefab and modular ADU lines including Abodu, Cover, and Dvele, which suit many Newbury Park lots because the factory-built shell reduces on-site framing time. We also handle our brands of James Hardie cladding and Tuff Shed conversions for buyers who want a faster path to permitted square footage.
Pricing for ADU Company in Newbury Park, CA
These are the typical ranges we quote in Newbury Park, based on current build costs and local site conditions. Every project gets a written, line-item price before work begins.
| Service | Typical range in Newbury Park |
|---|---|
| Detached ADU, 400 – 700 sq ft | $180,000 – $280,000 |
| Detached ADU, 700 – 1,000 sq ft | $250,000 – $360,000 |
| Detached ADU, 1,000 – 1,200 sq ft | $320,000 – $420,000 |
| Junior ADU (interior conversion) | $90,000 – $150,000 |
| Garage conversion to ADU | $130,000 – $220,000 |
| Prefab ADU, turnkey (Abodu, Cover, Dvele) | $200,000 – $340,000 |
| Home addition, 300 – 600 sq ft | $120,000 – $220,000 |
| Home addition, 600 – 1,000 sq ft | $220,000 – $350,000 |
| Room addition, single room | $70,000 – $130,000 |
| Room addition, primary suite bump-out | $110,000 – $190,000 |
What pushes a Newbury Park quote toward the higher end is usually hillside grading, retaining walls, or HOA design review. The lower end assumes a relatively flat lot with easy utility access. Whatever your site looks like, the price we give you before work begins is the price you pay, and that’s the promise. Call (472) 248-8213 for an exact quote.
Neighborhoods We Serve in Newbury Park
We work all over Newbury Park, from the older, tree-lined streets near the 101 to the newer communities on the hillsides. Our crews know the permit office rhythm in Ventura County and the typical HOA review cycles in the planned developments.
- Dos Vientos
- Rancho Conejo
- Vallecito
- Casa Conejo
- Ventu Park
Most jobs in Newbury Park can be scheduled within a few weeks of the estimate, depending on the size of the project and how quickly the HOA turns around its review.
Service Area – Cities Near Newbury Park
We serve Newbury Park and the surrounding Conejo Valley communities. If you’re in Thousand Oaks, CA, Westlake Village, CA, Moorpark, CA, or Oak Park, CA, the same written-price guarantee and photo-badged crew standards apply. Each location handles its own local permits, but the process for you stays the same.
Serving Newbury Park, CA - Our Local Coverage Area
We’re based in the Newbury Park 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 Newbury Park
Yes. We prepare the drawings and documentation your HOA requires and submit them as part of the permit package. HOAs in developments like Dos Vientos and Rancho Conejo often have specific architectural guidelines, and we work within them from the first site visit. Call (472) 248-8213 to talk through your HOA’s requirements.
Most detached ADUs in Newbury Park take six to nine months from permit submission to final inspection. Prefab units can trim that to four to six months once permits are approved. Site grading and HOA review are the two things most likely to add time. Call (472) 248-8213 for a realistic timeline on your lot.
Every Newbury Park project gets a written, line-item price before we start. That price is fixed. The 365-Day Done Right Promise then covers defects in workmanship for one full calendar year from project completion. If something isn’t right, we return and fix it, no haggling. Call (472) 248-8213 to schedule your free estimate.
Call (472) 248-8213 to schedule a free estimate for your Newbury Park ADU, home addition, or room addition. A real person answers, and you’ll get 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 Newbury Park Customers Say
"Backyard ADU for my mother. The project manager showed ID and walked me through the permit steps, the foundation plan, and the schedule. Moved her in on time."
- Margaret C."Insulated the walls and ceiling properly. It stays comfortable even in July."
- Tamika W."They handled the drawings and the permit paperwork for us. All I had to do was pick the finishes."
- Rosa M.
