ADU Contractors in San Diego County, CA
12,325 active, license-verified contractors with an office of record in San Diego County — general builders (A & B) and the licensed trades that build ADUs (C-10 electrical, C-36 plumbing, C-5 framing). Pick your city, or search directly.
Mars Construction Industries Corp
ADU Cities' own design-build team
CSLB #1138550 · A · B · C-36 · C-20
Building ADUs across Los Angeles, Orange, Riverside, San Bernardino, San Diego & Ventura counties
San Diego County is California's second-most-populous county, with ADU activity from Oceanside and Escondido down through the city of San Diego to Chula Vista and the border communities. This directory lists 12,325 active, license-verified contractors with an office of record in the county — general builders (A and B) plus the licensed trades ADU projects use (C-10 electrical, C-36 plumbing, C-5 framing).
The city of San Diego runs one of the state's most active ADU programs, but the other 17 incorporated cities — and the county itself, for unincorporated areas — each apply their own standards. Match the contractor's license check here with a rules check for your exact address before you hire.