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
An ADU in Agoura Hills is one of the smartest ways to add living space, rental income, or a dedicated work-from-home setup without leaving the community you already like. Most Agoura Hills properties are single-family homes on lots that actually have room to build, which is rare in closer-in Los Angeles neighborhoods. The terrain, fire-zone building codes, and specific permit path here shape how ADUs and additions get designed and built, so you want a contractor who knows the area. Call (903) 568-7222 to talk through your lot and your options with a real person.
Why Agoura Hills Homes Are Different
Agoura Hills straddles the line between suburban Los Angeles County and the open space of the Santa Monica Mountains, and that position affects nearly every construction decision. Many homes sit on sloped or irregular lots, which means foundation design, drainage, and grading get more attention here than they would on a flat infill lot in the Valley. The City of Agoura Hills designates significant portions of its land as open space and hillside management areas, so setbacks and lot coverage rules can shift depending on your specific parcel and any overlay zones.
Fire hardening is not optional here. The hillside neighborhoods north of the 101, including Morrison Ranch and Old Agoura, fall under Cal Fire’s Very High Fire Hazard Severity Zone mapping in many cases, which affects cladding choices, venting requirements, and defensible space planning. James Hardie fiber cement siding is a common spec on ADUs we build in these areas because it meets the fire-resistance expectations without giving up the look homeowners want. Older homes in the Liberty Canyon and Lake Lindero pockets from the 1970s and 80s were often built to looser energy and seismic standards than what code requires today, so tying a new ADU into the existing electrical panel and foundation can surface unexpected scope. We plan for that in writing before the first permit is pulled.
HOA communities like Morrison Ranch and parts of Lake Lindero add another layer: architectural review committees with their own color palettes, fence-height limits, and exterior material preferences. We have built through enough of these reviews to know which questions to ask before you spend money on drawings.
Our Main Agoura Hills Services
Most Agoura Hills homeowners call us for one of two things: a backyard ADU they can rent out or use for family, or a home addition that keeps the household under one roof without moving. Here is what each looks like in this city.
ADU Builders in Agoura Hills
Detached ADUs in Agoura Hills typically run from studio layouts around 400 square feet up to two-bedroom units at the state maximum of 1,200 square feet. Because many local lots slope, we often see foundation adders for pier-and-grade-beam systems or retaining work that flat-lot cities never deal with. Prefab ADU brands like Abodu and Cover work well on Agoura Hills lots because their panelized construction shortens on-site time, which matters when your build window sits between rain and fire season. Every ADU we start here gets a written price before any work begins. See the full breakdown on our ADU Builders in Agoura Hills page.
Home Addition Contractor in Agoura Hills
A ground-floor home addition in Agoura Hills often means a new primary suite, a larger kitchen, or a family room that opens to the backyard. The local variables are the same: slope, fire-zone materials, and HOA review in several neighborhoods. When an addition triggers a panel upgrade or re-roof requirement, that gets line-itemed up front rather than discovered mid-project. You can read more about what a full addition involves in this city on our Home Addition Contractor in Agoura Hills page.
Room Addition Contractor in Agoura Hills
Room additions in Agoura Hills are the practical middle path: one new bedroom, an office, a mudroom, or an expanded living space without reworking the entire floor plan. These jobs still require structural drawings, title-24 energy calculations, and city plan check, but they move faster than full additions or ADUs. In hillside neighborhoods especially, a single room addition can hinge on where the setback line falls, so we verify that during the estimate. Details and local cost ranges are on our Room Addition Contractor in Agoura Hills 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 Agoura Hills
We build with and maintain ADUs and additions from the brands homeowners can research themselves: Abodu, Cover, Dvele, and James Hardie cladding. Common panels and cladding materials are stocked regionally, which keeps lead times short here. Visit our brands to compare product specifications.
Pricing for ADU Company in Agoura Hills, CA
These are the ranges Agoura Hills homeowners most often ask us to price. Your lot, scope, and finish level will move the final number, but these figures are honest starting points.
| Service | Typical Range in Agoura Hills |
|---|---|
| Detached ADU (studio, 400 sq ft) | $180,000 – $240,000 |
| Detached ADU (1-bedroom, 600 – 700 sq ft) | $240,000 – $320,000 |
| Detached ADU (2-bedroom, 900 – 1,200 sq ft) | $320,000 – $450,000 |
| Garage conversion ADU | $120,000 – $190,000 |
| JADU (attached junior unit, under 500 sq ft) | $90,000 – $150,000 |
| Prefab ADU (Abodu, Cover, Dvele) | $200,000 – $380,000 installed |
| Home addition (primary suite, 400 – 600 sq ft) | $160,000 – $280,000 |
| Home addition (kitchen expansion, 200 – 400 sq ft) | $90,000 – $180,000 |
| Room addition (single bedroom/office, 150 – 250 sq ft) | $60,000 – $120,000 |
| Second-story addition (per sq ft) | $350 – $500 |
In Agoura Hills specifically, slope work, fire-zone material upgrades, and HOA-required finish packages are the three most common price movers. You will always get a written price before work starts, and that price does not change once we begin.
Neighborhoods We Serve in Agoura Hills
We run ADU and addition projects across Agoura Hills, from the flat streets near the 101 to the hillside lots with canyon views. Our crews work the whole city and typically schedule estimates within a few days of your call.
- Old Agoura
- Morrison Ranch
- Lake Lindero
- Liberty Canyon
- Malibu Junction area
Service Area – Cities Near Agoura Hills
While this page focuses on Agoura Hills, Benson ADU Builders also handles ADUs and additions in the surrounding Conejo Valley and west Valley communities. Homeowners just over the line in Westlake Village, CA, Oak Park, CA, Calabasas, CA, and Thousand Oaks, CA get the same written-price guarantee and pre-construction process.
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
Most Agoura Hills ADU projects move from signed contract to permit submittal in four to six weeks, depending on how fast your designer completes drawings and how quickly the city reviews them. Site-built ADUs typically take five to eight months after permits are issued. Prefab ADUs from Abodu or Cover can cut on-site construction time by several weeks. Call (903) 568-7222 for a realistic timeline on your lot.
If your home is in Morrison Ranch, Lake Lindero, or another HOA-governed community, yes, you will need architectural review in addition to city permits. The approval process typically takes two to six weeks depending on the HOA’s review calendar. We prepare submission packages in the format your specific association expects.
California state law (AB 68 and SB 9) requires cities to allow at least one ADU on most single-family residential lots, which applies throughout Agoura Hills. The main local constraints are hillside setback rules, fire-zone construction standards, and any lot-specific easements. A site assessment will tell you exactly what fits on your parcel before you commit to anything.
Ready to see what an ADU or addition looks like on your Agoura Hills lot? Call (903) 568-7222 or reach out through the home page to schedule a free estimate. Troy Eastman and the Benson ADU Builders team will give you a written price and a straight answer.
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
"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.
