A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Woodland Hills, CA
Adding an ADU, a home addition, or a room addition in Woodland Hills means working with a city that has some of the San Fernando Valley’s most varied topography, from flat Warner Center lots to hillside parcels off Mulholland Drive. Sutton ADU Builders handles the full scope: detached ADUs, garage conversions, and room additions, each with a written price locked before any work begins. If you’re trying to figure out what’s possible on your lot, call (472) 248-8213 and we’ll walk through it with you in plain terms.
Why Woodland Hills Homes Are Different
Woodland Hills homes run the range from 1950s ranch houses to 1980s and 1990s two-story builds, and that stock has real consequences for ADU work. Many older homes in the South Valley carry original 100-amp electrical panels, which usually need an upgrade before a detached ADU can be permitted. Seismic requirements also shape the work: Woodland Hills sits near the Santa Susana fault zone, so foundation and shear wall specifications get extra scrutiny from plan check. Hillside lots south of Ventura Boulevard often involve graded pads, retaining walls, and drainage challenges that a flat-lot builder never has to think about.
Setbacks in Woodland Hills follow Los Angeles municipal code, but the practical reality is that many lots have unusual shapes, existing easements, or protected oak trees that shift where a structure can actually go. HOA rules in some pockets of Woodland Hills, particularly around Warner Center and newer developments, can also layer extra review on top of city permitting. We account for all of this during the estimate, not after the contract is signed.
Our Main Woodland Hills Services
Most Woodland Hills homeowners come to us for one of three projects: a home addition that expands the main house, a detached ADU that adds a fully separate living unit, or a room addition that extends one part of the floor plan. Each has its own page with Woodland Hills-specific pricing and process details.
Home Addition Contractor in Woodland Hills
A home addition in Woodland Hills typically means expanding the footprint of the main house, often upward on flat lots or outward where setbacks allow. We’ve worked on additions that attach to 1960s ranches in the flats near Topanga Canyon Boulevard and on hillside properties that required pier-and-grade-beam foundations before framing could start. The key early question is always the same: what does the lot’s soil report and the existing foundation support? You’ll get answers and a written price before any scope is locked. Home Addition Contractor in Woodland Hills.
ADU Builders in Woodland Hills
A detached ADU in Woodland Hills usually runs 600 to 900 square feet, though we build smaller studio units and larger two-bedroom models depending on lot constraints and city limits. Hillside parcels south of Ventura often need additional grading and retaining work before a prefab or stick-built unit can be placed, and that site work is where vague estimates collapse. We itemize it. We also work with prefab lines like Cover and Abodu, which can shorten on-site construction and reduce disruption to your household. ADU Builders in Woodland Hills.
Room Addition Contractor in Woodland Hills
A room addition in Woodland Hills is often the fastest way to add a bedroom, a home office, or a larger kitchen without building a separate structure. The main constraint is usually access to the build area, especially on hillside homes where every material delivery has to make a tight turn off a canyon road. We plan for that on the front end, and the written estimate includes the delivery and access costs instead of surprising you with them later. Room Addition Contractor in Woodland Hills.
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 Woodland Hills
We work with Cover, Dvele, and Mighty Buildings prefab systems, and we stock common parts for their builds locally so minor issues don’t sit for weeks. Our teams have hands-on experience assembling these product lines in Southern California’s climate and seismic environment. See our brands page for the full list.
Pricing for ADU Company in Woodland Hills, CA
| Service | Typical range in Woodland Hills |
|---|---|
| Detached ADU (600 – 900 sq ft) | $180,000 – $320,000 before site work |
| Garage conversion ADU | $90,000 – $140,000 |
| Home addition (main house expansion) | $250,000 – $450,000 |
| Room addition (single room) | $55,000 – $110,000 |
| Tuff Shed conversion | $35,000 – $65,000 |
| Electrical panel upgrade (100A to 200A) | $2,800 – $4,500 |
| Hillside foundation and grading | $30,000 – $90,000 depending on slope |
| Permits and plan check | $8,000 – $20,000 |
| Hardie cladding system | $12 – $18 per sq ft installed |
| Site prep and demolition (existing garage) | $12,000 – $25,000 |
The two biggest price drivers in Woodland Hills are hillside conditions and the age of the existing electrical service. If your home still has a 100-amp panel or the property slopes more than a gentle grade, expect those line items to appear. Whatever the total, you receive the full written price before any work starts, so there’s no mid-project surprise invoice.
Neighborhoods We Serve in Woodland Hills
We serve the full Woodland Hills area, from the flatter commercial stretch along Ventura Boulevard up into the hillside streets south and west. Response time for estimates across the city is typically one to three business days. Neighborhoods we regularly work in include:
- Warner Center
- Walnut Acres
- Woodland Hills Estates
- South of Ventura (Foothill Trails area)
- Woodland West
Service Area – Cities Near Woodland Hills
While this page is focused on Woodland Hills, our crews also cover neighboring communities across the West Valley. If you’re near the border, you’ll find us in Canoga Park, CA, Topanga, CA, Tarzana, CA, and West Hills, CA. Scheduling and dispatch are coordinated from the brand’s Los Angeles office, with crews working locally in Woodland Hills.
Serving Woodland Hills, CA - Our Local Coverage Area
We’re based in the Woodland 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 Woodland Hills
You can usually schedule an estimate within one to three business days. We’ll walk the property, discuss your goals, and deliver a written price that includes everything we saw and measured. Call (472) 248-8213 to set it up.
Yes. We pull all permits directly with the city of Los Angeles and prepare the drawings, structural calculations, and documentation your plan checker needs. If your HOA has architectural review requirements, we’ll prepare the submission package for you. Call (472) 248-8213 to talk through your specific situation.
We do. Hillside lots require additional foundation, drainage, and retaining wall design, and those costs are included in your written estimate from the start. We don’t give a flat-price ballpark that silently climbs once the soil report comes back. Call (472) 248-8213 for an exact quote.
Have a project in mind? Call Sutton ADU Builders at (472) 248-8213 for a free estimate. We’ll give you a straight answer on what your Woodland Hills lot can support and 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 Woodland Hills Customers Say
"Every crew member was vetted and carried a badge, which matters when they are around your family for months. Tidy site every day."
- Daniel F."Itemized estimate with allowances laid out. Final cost was within a hair of the quote."
- Naomi R."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.
