A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Los Angeles, CA
Adding an ADU or home addition in Los Angeles means working within one of the most tightly regulated and terrain-diverse building environments in the country. Sloped lots, seismic retrofit requirements, and neighborhood-specific zoning overlays change how a project gets designed and priced. Sutton ADU Builders helps Los Angeles homeowners navigate those conditions with a written price before work starts and a 365-Day Done Right Promise behind every build. Call (472) 248-8213 to talk through your lot and what’s possible.
Why Los Angeles Homes Are Different
Los Angeles housing stock runs from 1920s bungalows in Highland Park to mid-century ranches in the Valley to hillside stilt homes in Echo Park and Mount Washington. Each era comes with its own framing methods, foundation types, and setback realities. Hillside lots, in particular, often need engineered retaining walls or drilled caissons before a single wall goes up, and that site work can add $25,000 to $60,000 to a project before framing begins.
The climate is kind to construction in most months, but Los Angeles does have real constraints. Fire zones in the foothills require specific exterior materials and defensible-space planning. The local building department’s plan-check timelines vary by district office, and some neighborhoods have design review boards that add weeks to approval. We plan for these things up front so the schedule you’re quoted is a schedule we can hold.
Our Main Los Angeles Services
Los Angeles homeowners most often call us for three kinds of work: a full home addition, a detached or attached ADU, or a room addition that expands existing square footage. Each has its own Los Angeles page with pricing, timelines, and the local conditions that shape the job.
Home Addition Contractor in Los Angeles
A home addition in Los Angeles typically means extending a single-story home out into the yard or adding a second story over an existing footprint. On many Los Angeles lots, the practical limit is the rear setback, which is the required gap between the new wall and the back property line. Some older neighborhoods have smaller setbacks on paper than what’s actually built on neighboring homes, which means a survey and title review matter before we quote. See what a Home Addition Contractor in Los Angeles can do for your property.
ADU Builders in Los Angeles
Detached ADUs and garage conversions are the most common projects we price in Los Angeles. A garage conversion often works well in neighborhoods like West Adams and Leimert Park, where detached garages sit on alley-loaded lots and already have a foundation worth keeping. A detached ADU on a hillside lot is a different animal entirely: more structural work, more site access planning, and a longer build. Learn what’s involved from ADU Builders in Los Angeles.
Room Addition Contractor in Los Angeles
A room addition in Los Angeles can mean a new bedroom, a larger kitchen, or an office built off the back of the house. In neighborhoods like Mar Vista and Westchester, we often see additions tied to an existing flat roof or a post-and-beam structure that needs careful tie-in work so the new section doesn’t leak where old meets new. Room Addition Contractor in Los Angeles pricing and planning details are on the service 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 Los Angeles
We work with prefab and modular ADU lines including Abodu, Dvele, and Mighty Buildings, as well as Tuff Shed conversions and James Hardie exterior systems. Parts and material lead times vary by brand and spec, and we’ll tell you which product lines are stocked or warehoused within a reasonable delivery window for Los Angeles. See our brands for the full list.
Pricing for ADU Company in Los Angeles, CA
| Service | Typical range in Los Angeles |
|---|---|
| Garage conversion ADU (350 – 500 sq ft) | $120,000 – $185,000 |
| Detached ADU (500 – 800 sq ft, single-story) | $180,000 – $320,000 |
| Detached ADU (800 – 1,200 sq ft) | $300,000 – $450,000 |
| Second-story addition (400 – 600 sq ft) | $220,000 – $350,000 |
| Room addition (200 – 400 sq ft, ground-floor) | $90,000 – $180,000 |
| Site preparation (sloped lot, retaining, caissons) | $25,000 – $60,000 |
| Kitchen addition (with plumbing and electrical) | $100,000 – $220,000 |
| Tuff Shed conversion to livable space | $70,000 – $140,000 |
Hillside work, fire-zone exterior requirements, and design review boards are the three things that push Los Angeles pricing past the ranges above. Every project gets a written price before work begins, and that price doesn’t change unless you change the scope. No surprise invoices, ever.
Neighborhoods We Serve in Los Angeles
Our crews work across Los Angeles from the Valley to South LA to the Eastside. Response time for a site visit is typically within a few business days of your call, depending on where you are and how full the schedule is that week.
- Echo Park
- Highland Park
- West Adams
- Mar Vista
- Granada Hills
Service Area – Cities Near Los Angeles
In addition to Los Angeles proper, we price projects in the surrounding cities where homeowners face similar lot sizes, zoning rules, and planning timelines. Coverage includes Huntington Park, CA, South Gate, CA, Bell, CA, and Maywood, CA. If you’re on the edge of our area, call and ask; the answer is usually yes.
Serving Los Angeles, CA - Our Local Coverage Area
We’re based in the Los Angeles 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 Los Angeles
Most garage conversions finish in 4 to 6 months, while detached ADUs run 6 to 10 months depending on site work and plan-check timelines. Los Angeles plan-check windows vary by district office, so your finish date depends partly on where your property sits. Call (472) 248-8213 and we’ll walk through a realistic timeline for your specific lot.
Yes. We pull permits on every project, and we manage the plan-check process with the Los Angeles Department of Building and Safety. Some neighborhoods also require design review or hillside approval, and we handle that paperwork too. You won’t be asked to stand at a counter wondering what form comes next.
No. Your written price is locked before we lift a tool. The only thing that changes it is a change you ask for in writing, and you’ll see the new number before that work begins. The 365-Day Done Right Promise then covers workmanship for one full calendar year from project completion.
Ready to talk about your lot? Call (472) 248-8213 for a free estimate and a written price from Sutton ADU Builders in Los Angeles. You’ll know exactly who’s coming to your property before they arrive, and what the job will cost before it starts.
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 Los Angeles Customers Say
"Insulated the walls and ceiling properly. It stays comfortable even in July."
- Tamika W."They handled the drawings and the permit paperwork for us. All I had to do was pick the finishes."
- Rosa M."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.
