A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Calabasas, CA
Calabasas ADU projects follow a different set of rules than almost anywhere else in Los Angeles County. The hillside and scenic corridor overlays that protect the city’s oak-studded character add layers of environmental review that most homeowners never see coming, which is why so many Calabasas families choose attached units or garage conversions over detached new construction. We’re Seedling ADU Builders, and we help Calabasas homeowners plan around those constraints before they spend a dollar. Call (559) 249-3776 to talk through your lot with someone who knows this city’s process.
Why Calabasas Homes Are Different
Most Calabasas housing stock was built in the 1980s and 1990s: large custom estates, gated communities, and the newer uniform tracts of Calabasas Park. That means big lots, but also mature oak trees, steep grades, and HOA design-review boards that get a say in what gets built. We regularly see original detached garages in Mulwood and Calabasas Hills set far from the main house, and those garages almost always have undersized foundations that need structural upgrades before an ADU conversion is possible. Homeowners who budget for a simple conversion get surprised by a foundation bill, and nobody wants that kind of surprise mid-project.
The climate adds another layer. Hot, dry summers and Santa Ana wind events, especially in the western hills near the Ventura County line, push Calabasas ADUs toward fire-resistant siding and careful defensible-space planning. A James Hardie fiber-cement exterior or similar rated product is often the right call here, not an upgrade. We plan for these realities up front so the price you see is the price you pay.
Our Main Calabasas Services
Most Calabasas homeowners call us about one of three things: adding square footage to the main house, converting an existing garage into living space, or building a standalone ADU. Here’s what each involves in Calabasas.
Home Addition Contractor in Calabasas
Home additions in Calabasas often involve extending into sloped terrain, which means retaining walls, drainage plans, and structural engineering before framing starts. We handle that coordination for you, and we bring the same written-price-before-work-starts promise to every addition. If you’re adding a primary suite near the kids’ rooms, our crews use quiet tools during school hours and leave the floors clean enough for a toddler to crawl on. See the full breakdown on our Home Addition Contractor in Calabasas page.
Garage Conversion Contractor in Calabasas
Many Calabasas garages were built as detached structures with slab-on-grade foundations that were never designed to carry walls and a roof for living space. We inspect the foundation first, tell you honestly what it needs, and put that number in your written estimate before work begins. In gated communities, we also help navigate HOA architectural-review requirements so the project doesn’t stall. Details are on our Garage Conversion Contractor in Calabasas page.
ADU Builders in Calabasas
A new detached ADU on a Calabasas hillside lot triggers environmental review that can add months and tens of thousands of dollars. For many lots, an attached ADU or a garage conversion makes more sense, and we’ll tell you that plainly before you commit to anything. When the site works for it, we build detached units with materials that stand up to Santa Ana conditions. Read more on our ADU Builders in Calabasas 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 Calabasas
We work with the prefab and modular brands Calabasas homeowners actually research before calling anyone: Abodu, Cover, and Dvele, with James Hardie siding and trim on site-built projects. Turnaround depends on which product fits your lot, so ask us which one makes sense for your property. See our brands for the full picture.
Pricing for ADU Company in Calabasas, CA
| Service | Typical range in Calabasas |
|---|---|
| Attached ADU (under 500 sq ft) | $145,000 – $210,000 |
| Attached ADU (500 – 800 sq ft) | $210,000 – $310,000 |
| Detached ADU (under 500 sq ft) | $220,000 – $340,000 |
| Detached ADU (500 – 800 sq ft) | $340,000 – $480,000 |
| Detached ADU (800 – 1,200 sq ft) | $480,000 – $680,000 |
| Garage conversion (finished interior) | $85,000 – $145,000 |
| Garage conversion (full rebuild) | $145,000 – $240,000 |
| Home addition (400 – 600 sq ft) | $160,000 – $260,000 |
| Home addition (600 – 900 sq ft) | $260,000 – $410,000 |
| Foundation upgrade (existing garage) | $18,000 – $45,000 |
Hillside lots, fire-resistant exterior requirements, and HOA design review all push Calabasas prices toward the higher end of these ranges. Every family gets a written price before any work starts, with no surprise line items added after crews arrive.
Neighborhoods We Serve in Calabasas
We work throughout Calabasas, from the gated estates of the Oaks to the older custom homes of Mulwood and the newer tracts in Calabasas Park. Our crews are local to this area, so response times stay tight.
- Calabasas Park
- Mulwood
- Calabasas Hills
- The Oaks
- Westridge
Service Area – Cities Near Calabasas
Our crews serve Calabasas and the surrounding communities. If you’re in Woodland Hills, CA, West Hills, CA, Topanga, CA, or Canoga Park, CA, we can schedule an estimate the same way: call and talk to a live person, then get a written price before anything starts.
Serving Calabasas, CA - Our Local Coverage Area
We’re based in the Calabasas 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 Calabasas
Calabasas hillside and scenic corridor overlays can add three to nine months of environmental review to a detached ADU application. Attached units and garage conversions typically move through faster because they avoid the most stringent review triggers. Call (559) 249-3776 and we’ll give you a realistic timeline for your specific lot.
Yes, especially in gated communities like Calabasas Park and the Oaks, where design-review boards can require specific exterior materials, roof styles, and setbacks. State law limits HOA power to block ADUs outright, but review and approval still take time. We help homeowners prepare HOA submittals as part of the project plan.
Yes. Our crews follow the Cedarwell Care Promise on every Calabasas job: shoe covers and drop cloths inside the home, pet-safe products where there’s a choice, a photo of the cleanup before the crew leaves, and a live person available by phone 24/7. We keep school-hours work as quiet as the job allows and communicate before anything changes in your home.
If you’re thinking about an ADU, garage conversion, or home addition in Calabasas, start with a conversation. Call (559) 249-3776 to schedule your free estimate, and we’ll walk your lot with you before you commit to anything.
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 Calabasas 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
