A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Agoura Hills, CA
Agoura Hills is a different kind of build than most Los Angeles County cities. Homes here sit in the Santa Monica Mountains, on large lots with oak trees, slopes, and in many cases, horse facilities. An ADU, garage conversion, or room addition has to account for hillside grading rules, fire-resistant materials, and in some neighborhoods, septic systems that predate modern sewer lines. Fielding ADU Builders works those conditions every week. We put the price in writing before any work starts, and we stand behind the finished project for a full year. Call (805) 309-3020 to talk through your property.
Why Agoura Hills Homes Are Different
Most Agoura Hills homes were built between the 1960s and 1990s. They are wood-frame with stucco or wood siding, often ranch-style or custom, and a large share sit on lots of half an acre or more. That is room for a detached ADU, but it also means working around mature oaks, drainage patterns, and in the Liberty Canyon and Old Agoura areas, original septic systems that may not handle the added load of a second dwelling. Before we quote a project, we look at what your lot will actually support, including sewer access, slope stability, and fire zone requirements.
Wildfire risk shapes nearly every ADU decision here. Agoura Hills falls within a Very High Fire Hazard Severity Zone, so new structures require ember-resistant vents, ignition-resistant siding, and cleared defensible space. The city also caps ADUs at 1,200 square feet for larger lots, and many neighborhoods fall under hillside overlay zones with setback and grading rules that are stricter than the flatland standard. A setback variance, the city’s written permission to build closer to the property line than the standard rule allows, is sometimes the only way to make a project fit. We handle that paperwork as part of the build.
Our Main Agoura Hills Services
Most Agoura Hills homeowners call us about one of three things: adding a room to the main house, converting an existing garage into living space, or building a detached ADU. Each has its own page here because each carries different permit requirements, price ranges, and site challenges in this city.
Room Addition Contractor in Agoura Hills
A room addition in Agoura Hills often means working against a hillside, not a flat suburban lot. Foundation and drainage work on sloped ground costs more and takes longer than on level terrain, and the design has to respect the low-density character that makes this city what it is. We handle the structural engineering, the permits, and the fire-hardening details in one contract. Room Addition Contractor in Agoura Hills covers the full scope, from a single bedroom bump-out to a ground-up family room.
Garage Conversion Contractor in Agoura Hills
Garage conversions are one of the fastest ways to add living space in Agoura Hills, since the foundation and roof already exist. The catch is the existing slab, which was rarely poured with habitable space in mind. We check for moisture, leveling issues, and whether the current footing can support a permitted conversion before we quote anything. Fire-rated separation from the main house and proper insulation against summer heat are standard here. Garage Conversion Contractor in Agoura Hills breaks down the process and pricing.
ADU Builders in Agoura Hills
Agoura Hills has real demand for ADUs from horse property owners and long-time residents who want rental income or space for extended family without leaving. The 1,200-square-foot cap on larger lots is generous by California standards, but hillside overlay rules and the dark-sky ordinance, which requires careful exterior lighting design to preserve the rural nighttime environment, add layers that a flatland builder might miss. We build both stick-frame and prefab ADUs and know what the city will approve. ADU Builders in Agoura Hills details the options and the permit path.
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 Agoura Hills
We work with Tuff Shed, James Hardie, and Abodu on Agoura Hills projects, and we keep common parts and finishes available locally so a build does not stall waiting on a shipment. See what we carry and support at our brands.
Pricing for ADU Company in Agoura Hills, CA
| Service | Typical range in Agoura Hills |
|---|---|
| Garage conversion to living space | $95,000 – $160,000 |
| Detached ADU, 400 – 800 sq ft | $180,000 – $320,000 |
| Detached ADU, 800 – 1,200 sq ft | $280,000 – $450,000 |
| Prefab ADU (platform build) | $150,000 – $300,000 |
| Room addition, 200 – 400 sq ft | $90,000 – $180,000 |
| Room addition, 400 – 700 sq ft | $150,000 – $260,000 |
| Septic upgrade or sewer connection for ADU | $15,000 – $40,000 |
| Fire-hardening upgrades on existing structure | $8,000 – $25,000 |
Two things push prices up in Agoura Hills faster than anywhere nearby: slope work and septic or sewer upgrades. If your lot in Liberty Canyon or Old Agoura still carries an original septic system, the city may require a larger tank or a sewer connection before it will sign off on an ADU. That is a real cost, often $15,000 to $40,000, and it can derail a project if it is not identified in the quote phase. We identify it in the quote phase, because our price is written before any work starts and that is the number on the final invoice.
Neighborhoods We Serve in Agoura Hills
We run crews throughout Agoura Hills, from the flatland subdivisions near Kanan Road up into the hillside lots that climb toward the open space. Most jobs we can reach the same week for an estimate.
- Old Agoura
- Liberty Canyon
- Morrison Ranch
- Lake Lindero
- Upper Downtown Agoura
Service Area – Cities Near Agoura Hills
We serve Agoura Hills and the surrounding Conejo Valley communities, including Westlake Village, CA, Oak Park, CA, Calabasas, CA, and Thousand Oaks, CA. Each of those areas has its own local rules and terrain, so we quote them the same way we quote Agoura Hills: after seeing the lot, not before.
Serving Agoura Hills, CA - Our Local Coverage Area
We’re based in the Agoura Hills 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 Agoura Hills
We schedule estimates in Agoura Hills every week, and most appointments happen within a few days of your call. The estimate itself is free, is based on the actual lot conditions, and comes with a written price before any work starts. Call (805) 309-3020 to set a time.
In many parts of Agoura Hills, yes. If your property is on an original septic system and the city determines it cannot support the additional bedroom or dwelling, you will need a larger tank or a sewer connection where one is available. We identify this during the quote phase so the number you approve includes it.
Agoura Hills requires exterior lighting on new construction to be designed to limit light spill and preserve the rural nighttime character. That typically means shielded fixtures, downward-facing light, and limits on fixture count. We include compliant lighting in every ADU and addition we permit here.
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 Agoura Hills Customers Say
"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."Room addition over the back patio. Framing is square, windows are tight, and the roofline matches."
- Danny L.
