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
Los Angeles is one of the most active ADU markets in the country, and the work here comes with conditions you won’t find in a new subdivision. We build and convert in a city where most housing stock predates modern seismic codes, where setbacks and soil reports determine what fits on a lot, and where a garage from the 1940s may share a foundation wall with a neighbor’s. This page gives you the lay of the land before you start: how Los Angeles jobs are priced, which brands we service, where we work, and what a written price actually covers. Call (361) 315-4177 and you’ll reach a live person, not a voicemail tree.
Why Los Angeles Homes Are Different
Los Angeles housing runs older and tighter than most people expect. A garage conversion in West Adams or Highland Park often means working with a single-car structure built before 1960, when slab depth, roof framing, and electrical service were measured to very different standards. We routinely see 100-amp panels that need upgrading before an ADU can pass inspection, and floor slopes that have to be corrected before framing starts. None of that is a dealbreaker. It does mean the job’s real scope shows up at the structural stage, not on the sales call.
Terrain shapes the work too. Hillside lots in Echo Park, Mount Washington, and Silver Lake create their own requirements: retaining walls, stem-wall foundations, and shoring that a flat-lot build in the Valley never needs. The city’s hillside grading rules are specific, and they add cost. Soil conditions near the river and in older basin neighborhoods can trigger a soils report before permitting moves forward. And because much of Los Angeles sits near active fault lines, shear-wall and tie-down requirements are stricter here than almost anywhere else in the state. We plan for the permit realities before we hand you a number, because a number you can trust is the only kind worth writing down.
Our Main Los Angeles Services
Three jobs make up most of what Los Angeles homeowners call us for: building a new ADU in the back, converting a garage into living space, and adding rooms to the main house. Each has its own page below, written for the way those projects actually go in this city.
Room Addition Contractor in Los Angeles
A room addition in Los Angeles means expanding a house on a lot that was usually platted decades ago, which makes setbacks, lot coverage, and matching rooflines the first questions on every job. We have built additions that tie into 1920s stucco bungalows and 1960s ranch homes, matching framing methods and finish details so the new section doesn’t read as an afterthought. Los Angeles also requires structural calculations and, in hilly areas, geological review before permits clear. This is work that rewards a contractor who prices from a plan instead of a guess. Learn what a room addition involves here: Room Addition Contractor in Los Angeles.
Garage Conversion Contractor in Los Angeles
Garage conversions are the single most common ADU type in Los Angeles, and the reason is simple: the structure already exists, which saves foundation and framing cost. The tradeoff is that many of these garages are old, undersized by current code, and built on slabs that were never meant to hold living space. Los Angeles inspections focus heavily on insulation, ventilation, and whether the slab needs moisture abatement before flooring goes down. We route electrical, plumbing, and drainage the right way, with permits pulled and inspections passed. Details are on this page: Garage Conversion Contractor in Los Angeles.
ADU Builders in Los Angeles
A detached ADU in Los Angeles gives you a build from the ground up, and that means foundation design, utility trenching, and a floor plan that fits both the lot and how you’ll actually use the space. Los Angeles lots are often shallow or oddly shaped, which pushes some homeowners toward prefab platforms that ship in sections and others toward conventional framing with James Hardie siding. We work both ways and lay out the real cost difference before you commit. The full breakdown for ground-up builds is here: ADU Builders in Los Angeles.
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 install and finish ADUs from Abodu, Cover, and Dvele, and we carry the common replacement parts for those systems on our trucks. That usually means most warranty callbacks around Los Angeles can be handled in a single visit. See the full list on our brands page.
Pricing for ADU Company in Los Angeles, CA
| Service | Typical range in Los Angeles |
|---|---|
| Detached ADU (prefab, turnkey) | $225,000 – $330,000 |
| Detached ADU (conventional build) | $250,000 – $400,000 |
| Garage conversion (attached, finished) | $120,000 – $190,000 |
| Garage conversion (detached, finished) | $140,000 – $220,000 |
| Room addition (ground floor, basic finish) | $90,000 – $150,000 |
| Room addition (second story) | $180,000 – $300,000 |
| Foundation & site work (hillside lot) | $25,000 – $75,000 |
| Electrical panel upgrade (100A to 200A) | $3,500 – $6,500 |
| Permit fees & plan check (city) | $4,000 – $12,000 |
| Soils report & structural engineering | $3,000 – $9,000 |
Hillside lots, old foundations, and outdated electrical panels are the three things that push Los Angeles prices past the ranges above, and all three are common here. The written price we hand you before work starts stands as the price on the final invoice. No change orders, no re-pricing at the door.
Neighborhoods We Serve in Los Angeles
Our crews work across the city, from the Valley to South LA and everywhere in between. Same-week estimates are the norm, and most areas are within a short drive of our scheduling office.
- Silver Lake
- Echo Park
- Highland Park
- West Adams
- Woodland Hills
Service Area – Cities Near Los Angeles
We serve the cities around Los Angeles as well, so if your home sits just over the line, you’re still inside our coverage. Nearby communities include Huntington Park, CA, South Gate, CA, Bell, CA, and Maywood, CA. The same written pricing and one-year guarantee applies in every one of those cities.
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 estimate visits in Los Angeles are scheduled within 5 to 7 business days, often sooner. We coordinate from our Los Angeles office, so we don’t have to route anyone in from another county. Call (361) 315-4177 to get a date on the calendar.
Yes. Every build and conversion in Los Angeles is covered by The Garrison Standard’s 365-Day Done Right Promise in writing. If something fails inside that year, we return and correct the defect at no charge. That guarantee is on paper before work begins.
We pull permits for every Los Angeles project and our work passes inspection before we hand it over. That means plan check, structural review, and any hillside or soils requirements are handled as part of the job, not left for you to chase. Call (361) 315-4177 and we’ll walk you through what your specific lot needs.
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
"Garage conversion with a new bath and kitchenette. Permit was handled by them. Inspection passed first time."
- Sheila B."Honest feedback on what the lot could fit. Told me up front what would fit on the lot and what the setbacks would allow."
- Rita C."Clear price breakdown. Change orders were all in writing."
- Hal P.
