ADU Cities designs and builds custom accessory dwelling units throughout Contra Costa County, California. Our in-house design-build team handles every step: feasibility and zoning review, architectural and structural plans, Title 24 energy documentation, permit submittal and plan-check corrections, construction, inspections, and final sign-off.
County ADU portal: Contra Costa County ADU page — Planning and building approval information.
Cities We Serve in Contra Costa County
- Antioch
- Brentwood
- Clayton
- Concord
- Danville
- El Cerrito
- Hercules
- Lafayette
- Martinez
- Moraga
- Oakley
- Orinda
- Pinole
- Pittsburg
- Pleasant Hill
- Richmond
- San Pablo
- San Ramon
- Walnut Creek
Don’t see your city listed? We serve all of Contra Costa County, including unincorporated communities. Call 562.810.1965 for a free consultation.
