A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in West Hills, CA
Seedling ADU Builders builds accessory dwelling units, garage conversions, and home additions across West Hills, CA. Working here means contending with three things most other Valley neighborhoods don’t face: huge lots zoned for horses, a very high fire hazard designation that changes what can be built, and 1960s-era electrical panels that usually need upgrading before any new structure connects. If you’re planning an ADU in West Hills, the best first step is a conversation about your specific lot. Call (559) 249-3776 and we’ll talk through what’s realistic before anyone picks up a tool.
Why West Hills Homes Are Different
West Hills sits at the far western edge of the San Fernando Valley, where July and August afternoons regularly push past 100°F and the Santa Ana winds come through dry and fast. That climate shapes how we build here. An ADU in West Hills needs insulation and air conditioning that can hold up through a full Valley summer, and because much of the neighborhood falls inside a Very High Fire Hazard Severity Zone, plans frequently require fire sprinklers and ember-resistant exterior materials. Homeowners are often surprised by that requirement during design, but it’s not a roadblock, just a planning step we account for from the first site visit.
Most of the housing stock here dates from the 1960s through the 1980s: single-story ranch and split-level homes on generous lots, many still sitting on original slab foundations. The two most common issues we see before an ADU can go up are aging electrical panels that can’t safely carry a second dwelling, and floor plans that need careful thought about where the new structure meets the main house. Ben Ortega, who leads our West Hills work, walks each family through what their specific home will need before a single line item appears in writing.
Our Main West Hills Services
West Hills homeowners call Seedling most often for three projects: a new detached ADU in the yard, a garage conversion that turns an underused space into living quarters, and a home addition when the main house needs to grow. Each has its own page with local detail.
Home Addition Contractor in West Hills
Adding onto a West Hills ranch or split-level usually means extending from the back or side of the existing footprint while keeping the original roofline feeling intentional. Many of these homes were built on slab, so we check foundation condition early and plan the addition’s connection to avoid slope issues on larger lots. If you’re thinking about growing the main house rather than building a separate unit, see what a Home Addition Contractor in West Hills can do for your home.
Garage Conversion Contractor in West Hills
A garage conversion in West Hills often makes sense because detached garages here tend to be oversized, giving you real square footage to work with. The catch is usually the same: the existing electrical service was sized for a washer and a workbench, not a full living space. We plan for the panel upgrade from the start so the converted unit passes inspection without surprises. Read more about how a Garage Conversion Contractor in West Hills approaches these projects.
ADU Builders in West Hills
West Hills has an unusually high concentration of large lots zoned for horses and rural residential use, which means many ADUs here aren’t small backyard studios. They’re full second homes with their own access considerations, and sometimes equestrian or RV access that has to be preserved. Setbacks and semi-rural character requirements shape what’s possible, so we start every West Hills ADU with a lot-specific conversation. Learn what ADU Builders in West Hills can do with your property.
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 West Hills
We work hands-on with prefab and modular systems from our brands, including Abodu, Cover, and Dvele. Choosing a prefab path can shorten on-site construction time significantly, which matters during West Hills summers. We help you compare what each system offers on your specific lot, then handle permits, site work, and finishing.
Pricing for ADU Company in West Hills, CA
| Service | Typical range in West Hills |
|---|---|
| Detached ADU (prefab system, full turnkey) | $180,000 – $320,000 |
| Detached ADU (site-built, custom) | $220,000 – $400,000+ |
| Garage conversion ADU | $120,000 – $210,000 |
| Attached ADU (junior or one-bedroom) | $110,000 – $190,000 |
| Home addition (one room) | $90,000 – $160,000 |
| Home addition (primary suite) | $140,000 – $240,000 |
| Electrical panel upgrade (typical for 1960s homes) | $3,500 – $7,000 |
| Fire sprinkler system (required in many West Hills zones) | $8,000 – $15,000 |
| Foundation work for slab-on-grade lots | $12,000 – $30,000 |
What pushes price up in West Hills is usually the same trio: fire sprinkler requirements, panel upgrades on older homes, and larger-than-average lot setbacks. Every family receives a written price before any work begins, with no added line items after crews arrive.
Neighborhoods We Serve in West Hills
We work throughout West Hills, from the horse-zoned properties along the western edge near the Bell Canyon border, to the ranch neighborhoods around Lazy J Park and the residential streets north of Victory Boulevard. Response time across the area is consistent; crews are scheduled locally and arrive with the full scope in hand.
- West Hills west of Valley Circle, including equestrian-zoned lots
- The neighborhoods around Lazy J Park and Highlander Road
- Residential streets north of Victory Boulevard
- The area near West Hills Hospital and Medical Center
- Homes along the Vanowen Street corridor
Service Area – Cities Near West Hills
Seedling ADU Builders serves West Hills and the surrounding West Valley communities. If you’re just over the border in Canoga Park, CA, Woodland Hills, CA, Winnetka, CA, or Calabasas, CA, the same crew, the same written pricing, and the same 365-Day Done Right Promise apply.
Serving West Hills, CA - Our Local Coverage Area
We’re based in the West 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 West Hills
Many West Hills properties fall inside a Very High Fire Hazard Severity Zone, which triggers a fire sprinkler requirement for new ADUs. We confirm your lot’s exact designation during the first site visit and build that requirement into your written price so it doesn’t surface later as a surprise. Call (559) 249-3776 to find out what applies to your address.
Permitting timelines vary, but West Hills projects in fire hazard zones often need additional review steps that can lengthen the design phase. We handle the full permit package, including defensible-space and setback documentation. A typical West Hills ADU moves from first conversation to permit-ready in a range of weeks to a few months depending on your lot’s specific requirements.
For lots with equestrian or RV access, we plan the ADU placement around those existing features rather than removing them. West Hills zoning often protects semi-rural character and access patterns, and we’d rather design around your stables and gates than ask you to give them up. Tell us what you need to keep, and we’ll build the plan around it.
If you’re ready to talk through what an ADU, garage conversion, or home addition would look like on your West Hills property, call (559) 249-3776 to schedule a free estimate. You’ll get a written price before any work starts, no exceptions.
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 West Hills Customers Say
"Garage to studio conversion with us living right there. They sealed off the dust, cleaned up daily, and respected our quiet hours. No surprise costs. Beautiful."
- Terrence Boylan"Garage conversion into a studio. They sealed off the work area so dust didn't get into the house, and cleaned up every day before leaving. Calm, careful team to have around."
- Darnell Hobbs"Junior ADU conversion inside the house. They were incredibly clean about it, plastic walls, floor protection, daily cleanup, all with a toddler in the home. Couldn't have asked for more care."
- Marcus Oyelaran
