Bay Area ADU Builder. purpose-built for Bay Area lots.
We design, permit, and build ADUs across the Bay Area — San Francisco, Oakland, Berkeley, Richmond, Walnut Creek, Fremont, San Jose, Palo Alto, Sunnyvale, Livermore, and surrounding cities.
Licensed California contractor · CSLB #1098432 · Bay Area desk · city-by-city review
About ADU Builder in Bay Area
Bay Area ADU projects are not LA ADU projects. Each city has its own planning department, its own review timeline, its own setbacks, its own fire separation and hillside rules. A detached ADU in San Jose moves differently than a backyard unit in Berkeley or a Peninsula hillside lot in Palo Alto. We map your specific city before drawings begin.
Every Bay Area ADU we deliver is a fixed-scope contract covering feasibility, design, city permits, construction, and rental-ready closeout — backed by the same construction standard our LA desk has refined over 120+ ADUs.
What we resolve before drawings begin.
- 01
City-by-city plan review
SF, Oakland, San Jose, Fremont, and the Peninsula cities each run ADU plan-check differently. We confirm reviewer, intake path, and timeline during feasibility.
- 02
Hillside and utility upgrades
Bay Area hillside lots carry grading, drainage, and access challenges that flat lots don't. Older homes often need sewer lateral or service upgrades before an ADU connects.
- 03
Parking, fire separation, and setbacks
Dense East Bay and Peninsula lots often trigger parking, fire separation, or setback adjustments. We resolve these during feasibility, not at plan-check.
Other Bay Area services.
All Bay Area services →Bay Area · ADU Builder FAQ
Questions Bay Area homeowners ask first.
Start a Bay Area ADU feasibility brief. We'll map your city's plan-check pathway, utility upgrades, setbacks, and rental income against your specific address.
How long does a Bay Area ADU take from brief to keys?
Most Bay Area ADUs run 13–18 months: feasibility and design (2–3 months), city plan-check (4–7 months — varies by city), and construction (6–8 months). Some cities are faster, some slower.What does a Bay Area detached ADU cost?
Most Bay Area detached ADUs we deliver land between $380K and $650K all-in, depending on size, finish, hillside conditions, and utility upgrades. Bay Area construction costs run 15–25% above LA equivalents.Which Bay Area cities do you build in?
SF, Oakland, Berkeley, Richmond, Walnut Creek, Concord, Pleasanton, Livermore, Fremont, Hayward, San Leandro, Palo Alto, Sunnyvale, Mountain View, Santa Clara, San Jose, San Mateo, Redwood City, Daly City, Milpitas, and surrounding cities.How much rental income from a Bay Area ADU?
Bay Area ADU rents commonly run $3,000–$5,500/month for a 1BR depending on city and finish. Peninsula and SF often exceed this.Do Bay Area ADU permits really take 6+ months?
It depends on the city. SF and the Peninsula often run longer; San Jose and parts of the East Bay can be faster. We give you a city-specific timeline at feasibility.
Begin your projectin twenty minutes.
A short feasibility review of your lot — what you can build, roughly what it costs, and how long it will take. Free of charge. No sales call afterwards unless you ask for one.
- No obligation
- Reply within 24 hours
- BBB A+ Accredited