Best ADU Builders in Los Angeles

NEO is the most reviewed dedicated ADU builder in Los Angeles and the reviews keep landing on the thing that actually matters here, which is getting through LADBS. Permit navigation is where LA projects die, and a builder who submits there constantly knows which corrections that plan checker issues before they issue them. Their marketed six-week garage conversion is aggressive, but garage conversions are the one ADU type where that is physically possible when the permit is clean.

There is a structure question you need to ask before signing, though. There are two active CSLB licenses here under the same qualifying individual: #1061134, NEO Builders Inc, licensed December 2019 and carrying workers compensation through January 2027, and #1114778, NEO Builders and Design Inc, licensed January 2024 and registered as workers comp exempt on the basis of having no employees. Both are active and clean. But a company running high volume with no employees on one entity means that work is subcontracted, and if your contract names the exempt entity, ask who carries comp for the people actually on your lot. An uninsured injury on your property is your problem more often than homeowners expect.

The ratings here are carried from research rather than read live, so treat 4.9 as approximate. Their Houzz profile exists but has no reviews on it at all, which is why that column says not found rather than showing you a number.

Otto came into this research flagged. One source said the license was active, another showed it inactive or expired around September 2025, and that conflict was the single highest-priority thing to resolve on this page. So I pulled it live.

It is active, and it is the cleanest record here. Homestead Build LLC, trading as Otto ADU, licensed since September 2021 and good through September 2027. Beyond the standard $25,000 contractor bond they carry a $100,000 LLC employee worker bond and $1,000,000 in liability insurance, and workers comp runs through January 2027 with no exemption claimed. CSLB does not require liability insurance at all, so carrying it is a choice about how they think about risk. On the paperwork alone, this is the builder I would be most comfortable sending someone to.

That directory conflict is worth sitting with for a second, because it cuts both ways. A stale aggregator record nearly cost a clean builder a place on this list, the same way a stale record can make a failing builder look fine. Neither direction is safe. Pull the license yourself.

The honest limit is the review base: around 11 Google reviews is thin, and the rating is carried from research rather than read live. Strong paperwork and a short public record is a different bet than a long record with paperwork questions. On the Westside, where the lots are tight and the plan checks are fussy, I would still take the strong paperwork.

An attached ADU is a harder job than a detached one and most people have it backwards. You are cutting into an existing structure, matching a roofline, tying into an existing panel and an existing sewer lateral, and discovering whatever the last owner did without a permit. A firm whose day job is remodeling has seen all of that. AP Remodeling is a remodeler that does ADUs rather than an ADU shop that will also remodel, and for attached work that is the right way round.

They also have the strongest evidence base I could verify myself. Houzz reads 5.0 across 93 reviews, which I read live on August 2, and 93 is a serious number on that platform. Their Google and Yelp figures are higher still but those are carried from research, so treat them as approximate.

One thing to check before you sign. Their workers compensation policy shows an expiration of August 31, 2026. Policies get renewed constantly and this is very likely routine, but a workers comp lapse puts a license into suspension automatically, and that is not a thing you want to discover mid-build. Pull the record, confirm the policy shows current, then carry on.

Twelve years on the same license is a long time in LA residential construction, and it is the first thing I look at when someone claims premium. Quality First has held an active B-General since February 2014, bond on file, workers comp renewed through July 2027, no gaps and no disciplinary anything on the record. Houzz reads 5.0 across 39 reviews, which I read live rather than taking from a directory.

What they get bought for is finish. The recurring theme across their reviews is finish quality and, unglamorously, a clean job site. That second one sounds trivial until you have lived next to your own build for seven months. If the ADU is going to be visible from your kitchen window for the next twenty years, paying for the crew that cares about the trim is not an indulgence.

They do not publish a range, which I hold against most builders and will hold against them too. Premium with no number means the only way to find out is a bid. Get two others for comparison, and make sure all three are quoting the same scope, because premium and mid quotes usually differ as much in what is excluded as in the headline figure.

Backyard Estates does ADUs and nothing else, and you can feel it in how the business is set up: a published set of floor plans, published pricing, and a process built around picking a model rather than starting from a blank sheet. In a market where most builders make you book a call to learn anything, that is worth something on its own.

The paperwork is strong. On top of the standard $25,000 contractor bond they carry a $100,000 LLC worker bond and $2,000,000 in liability insurance, with workers comp running through May 2027. That is the second best-covered license on this page after Otto.

The detail to know is geography. The license is registered in Upland, which is San Bernardino County and a good forty miles east of most of LA. They market across LA County and their published service area covers it, but a crew commuting from Upland to the Westside is a different daily reality than one based in Culver City. Ask where the crew that would actually build yours is based, and how many jobs they run at once. Their review base is also modest at around 23, and I could not verify a Yelp or Houzz record at all.

Villa is the prefab option I can actually stand behind on paper, and the reason is a detail most comparison pages miss. Their license carries a C47 Manufactured Housing classification alongside the B-General, which is the classification a prefab builder is supposed to hold, and plenty of companies selling “modular” ADUs do not have it. Active since July 2021, bond and workers comp both current when I checked.

The catch is that there is almost nothing to read. No Google presence I could verify, no Yelp record, no Houzz. For a company founded in 2019 that is unusual, and it means you are buying on the strength of the product and the paperwork rather than on other homeowners’ experiences. If predictable pricing and a fixed scope matter more to you than a thick review file, that trade is defensible. Just go in knowing you are making it.

One housekeeping note. When you look Villa up yourself you may hit a second record, #1139781, registered as a sole ownership at the same San Francisco address and marked inactive. That is not the operating license. The one doing the work is #1077688.

This one nearly did not make the page. The research had Waconah down as license not found, which under my own rules means no ranking. A name search at the state board turned up an active record straight away: #908219, Waconah Construction of Inglewood, licensed since December 2007.

And it is a more interesting license than most here, because it carries three classifications: B General Building, C10 Electrical and C36 Plumbing. On an ADU that matters more than it sounds. Electrical and plumbing are the two trades most likely to be subbed out, most likely to be the reason your schedule slips while everyone waits on one guy, and most likely to be where a rough inspection fails. A contractor licensed to do both in house controls that directly.

What I cannot give you is a review record. Nothing verifiable on Google, Yelp or Houzz, and the fact that a secondary research pass could not even find their license tells you how little of a public footprint they keep. Eighteen years of continuous licensure says the work exists. You will have to go get the references yourself, and on the Westside and down toward the beach cities I would ask specifically for jobs on lots like yours.

If budget is the binding constraint, this is where I would start in the Valley. The recurring theme across roughly 101 reported Google reviews at 4.8 is fair pricing and schedules that hold, which is a more useful pair of signals than a 5.0 built on a dozen reviews.

Two things to weigh against that. The license was issued in May 2024, which makes it the youngest on this page by a wide margin, and the qualifying individual on the record changed in June 2026, about two months before I pulled it. A qualifier change is routine paperwork most of the time. It can also mean the person whose experience the license rests on has just walked out the door. Ask who the qualifier is, how long they have been with the company, and how many completed ADUs they personally ran.

One more thing, and it is not a knock on their building. LA Family Builders publishes its own “best ADU contractors in Los Angeles” listicles. Plenty of firms do it. Just do not read a ranking published by a company that competes in that ranking as independent, including when it flatters someone else on this page.