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
Seedling ADU Builders is the ADU company Los Angeles homeowners call when they want a second home on their lot without the chaos that usually comes with construction. Our crews build accessory dwelling units, garage conversions, and home additions across Los Angeles, from hillside lots in Silver Lake to flat bungalow pockets in the Valley. Every project starts with a written price before any tool is picked up, and every finished job carries the 365-Day Done Right Promise. Call (213) 449-7136 to talk through your lot and your budget.
Why Los Angeles Homes Are Different
Los Angeles has one of the oldest and most varied housing stocks in the country. Many single-family homes here were built between the 1920s and 1970s, which means our crews regularly work with pier-and-beam foundations, non-standard framing, and original electrical panels that need upgrading before an ADU can be permitted. Hillside lots add another layer: a backyard ADU in Echo Park or Mount Washington often needs retaining walls, deeper footings, or specialized drainage work that flatland builds in the Valley never require.
The climate helps. Los Angeles’s mild, dry Mediterranean weather keeps construction moving year-round, so there’s no winter shutdown to plan around. That same climate shapes how Angelenos want their ADUs designed: patios, decks, and large sliding doors are common additions, blurring the line between indoor and outdoor living. For homes in the urban-wildland interface, like parts of Sherman Oaks and Brentwood, wildfire codes add ignition-resistant siding and defensible-space requirements that change material choices and cost.
Permits in Los Angeles are another reality. The city’s hillside, seismic, and fire-safety regulations overlap in ways that vary block by block. A detached ADU in West Adams may have one set of requirements, while the same footprint in Eagle Rock triggers slope-density rules and a geology report. We handle that paperwork as part of every project, so families don’t have to learn the municipal code to get their ADU built.
Our Main Los Angeles Services
Most Los Angeles homeowners reach out to us for one of three projects: adding square footage to the existing house, converting a garage into living space, or building a new ADU from the ground up. Each of these has its own dedicated Los Angeles page with pricing, timelines, and project details.
Home Addition Contractor in Los Angeles
A home addition in Los Angeles means extending the footprint of your existing house, and on many older lots that means careful foundation work first. Our Home Addition Contractor in Los Angeles page covers what a typical addition costs, how we handle tying new framing into 1920s-era construction, and why we pull permits on every job. Los Angeles additions often need to respect tight side-yard setbacks and lot-coverage limits, and our written pricing accounts for that from day one.
Garage Conversion Contractor in Los Angeles
Garage conversions are the fastest route to rental income or a private guest suite for many Los Angeles families. We convert attached and detached garages into fully permitted living spaces, adding insulation, electrical subpanels, and proper egress. Los Angeles has a specific quirk that helps here: in many R1 zones, you can build living space above a non-conforming garage as long as the footprint doesn’t grow. Read the full breakdown on our Garage Conversion Contractor in Los Angeles page.
ADU Builders in Los Angeles
Building a new ADU in Los Angeles means starting fresh on your lot, and that’s where prefab and modular options really shine. We work with Abodu, Cover, and Dvele, along with site-built construction, so you can compare factory-built precision against custom framing. Our ADU Builders in Los Angeles page lays out the full process, from soil testing to final inspection, and explains how the 365-Day Done Right Promise applies to prefab units the same way it does to site-built ones.
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
Seedling ADU Builders is factory-certified to install and finish ADUs from Abodu, Cover, and Mighty Buildings. Each factory has its own engineering tolerances and installation requirements, and our crews are trained on all of them. Explore the full list on our brands page.
Pricing for ADU Company in Los Angeles, CA
Here’s what typical ADU and home addition projects cost in Los Angeles. These ranges reflect what we see across the city, from flat lots in the Valley to hillside builds in the Northeast LA neighborhoods.
| Service | Typical range in Los Angeles |
|---|---|
| Studio ADU (site-built) | $120,000 – $180,000 |
| One-bedroom ADU (site-built) | $180,000 – $260,000 |
| Two-bedroom ADU (site-built) | $260,000 – $350,000 |
| Prefab ADU (studio, Abodu) | $140,000 – $200,000 |
| Prefab ADU (one-bedroom, Cover) | $200,000 – $280,000 |
| Garage conversion (attached, basic) | $80,000 – $120,000 |
| Garage conversion (detached, full finish) | $120,000 – $180,000 |
| Garage conversion with ADU above | $220,000 – $320,000 |
| Home addition (single room) | $90,000 – $150,000 |
| Home addition (primary suite) | $150,000 – $250,000 |
| Home addition (two-story) | $250,000 – $400,000 |
Hillside work, retaining walls, and seismic upgrades push Los Angeles pricing toward the upper end of these ranges. Prepare for geology reports and foundation engineering on any slope steeper than about 10 degrees. Whatever your final number is, you’ll see it in writing before we start, and it will not change unless you change the scope.
Neighborhoods We Serve in Los Angeles
Our crews cover the full city, and we know the blocks where steep lots, older foundations, and hillside codes intersect. Here are a few of the neighborhoods we work in regularly:
- Silver Lake
- Echo Park
- Highland Park
- Sherman Oaks
- West Adams
Lead times for scheduling an estimate vary by season, but our Los Angeles office coordinates every project directly, and a live person answers the phone 24/7 throughout the build.
Service Area – Cities Near Los Angeles
In addition to the city of Los Angeles itself, Seedling serves several surrounding communities. If your home is in South Gate, CA, El Segundo, CA, South Pasadena, CA, or Marina del Rey, CA, our crews can handle your ADU or addition with the same written-price guarantee and Care Promise as any job inside city limits.
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
Yes. We pull building, electrical, plumbing, and mechanical permits on every Los Angeles project, and we handle the plan check and inspection process from start to finish. Hillside and fire-zone projects may also need geology reports and LADBS special approvals, which we coordinate directly. Call (213) 449-7136 for specifics on your lot.
Most ADUs in Los Angeles range from $120,000 for a small prefab studio to $350,000 for a two-bedroom site-built unit. Your price depends on lot slope, foundation condition, utility connections, and finish level. We give every family a written price before any work begins, so you’ll know your exact number before you commit. Call (213) 449-7136 for a free estimate.
Hillside lots often require retaining walls, deeper foundations, and drainage engineering, while homes near wildfire zones need ignition-resistant siding and defensible-space clearances. Those requirements add to cost and timeline but are fully manageable with the right planning. We scope all of it upfront, in writing, before you sign anything. Call (213) 449-7136 to talk through your specific site.
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
"Quality ADU. Communication was good overall, with one quiet stretch during the inspection wait where I had to check in. Once moving again they were tidy and quick to finish."
- Noelle Friedman"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"Careful builders who treated our home like we still had to live in it, because we did. Dust controlled, driveway swept nightly, and the finished ADU is beautiful. No surprise costs either."
- Rick Abara
