The 10 ADU builders from Google's results for San Diego, California, ordered by Google rating weighted by review count. No firm pays to be listed or ranked.
Last updated
Licensing in California. California contractors need a CSLB license for most remodeling work. Check the license number and its bond on the CSLB site before you sign.
on GoogleSan Diego, CA
MeeBuilders builds accessory dwelling units in Bonita and across San Diego County. The company helps homeowners decide between managing an ADU project themselves or hiring a builder, then takes the unit from feasibility review through construction to final inspection.
(858) 828-4714 8400 Miramar Rd Ste 200a, San Diego, CA 92126
on GoogleSpring Valley, CA
S Squared General & Pool Contractor builds accessory dwelling units and converts garages in Jamul and across San Diego, working from Spring Valley. ADU projects include design, permitting and construction for rental units, guest suites, home offices and multigenerational living, and the company also remodels kitchens.
(619) 374-2448 3343 Bancroft Dr, Spring Valley, CA 91977
on GoogleSan Diego, CA
TR Construction builds accessory dwelling units in San Diego, California.
(858) 537-6490 9335 Mira Mesa Blvd, San Diego, CA 92126
on GoogleSan Diego, CA
SnapADU builds detached accessory dwelling units in San Diego on a turnkey basis. Each project bundles design, permits, sitework, utility connections and construction with standard finishes, and the company publishes detailed cost breakdowns by unit size and site conditions.
(760) 259-2614 1223 Cleveland Ave #200-115, San Diego, CA 92103
on GoogleSan Francisco, CA
Villa Homes builds ADUs in San Francisco, California.
(415) 968-1625 1 Letterman Dr Ste C3500, San Francisco, CA 94129
San Diego, CA
Instant Living builds accessory dwelling units in San Diego and Southern California.
(858) 205-8014 3954 Murphy Canyon Rd, San Diego, CA 92123
Vista, CA
Crest Backyard Homes builds accessory dwelling units in Vista, California.
(760) 815-6977 2982 Ora Avo Terrace, Vista, CA 92084
San Diego
Around San Diego, North County ADU Builders constructs detached ADUs, garage conversions, attached units built as home additions and junior ADUs. Much of the work involves in-law suites, giving homeowners a separate living space for relatives on an existing residential lot.
San Diego
Pro Pacific Builders builds accessory dwelling units in San Diego, California.
San Diego
In San Diego, a garage conversion ADU typically costs $66,500 – $166,500. Remodeling labor in San Diego runs about 11% above the US median, which accounts for most of the difference from the same project elsewhere.
These are the firms from Google's results for "adu builders san diego", with directories, chains and suppliers removed. They are ordered by Google rating weighted by review count, and the ratings shown are Google's. No firm pays to be listed or ranked. The list was last updated in October 2026.
It depends on your city and state. California, Oregon and Washington have state laws that make ADUs allowed on most single-family lots. Elsewhere it is set by local zoning, so check lot size, setback and owner-occupancy rules with your city first.