Bay Area JADU Builder. the in-the-house option.
A JADU is the smallest legal Bay Area dwelling — up to 500 sqft, carved from the existing house, with its own entrance and an efficiency kitchen. California state law allows one JADU plus one ADU on every single-family lot, which makes the JADU an underused tool for Bay Area homeowners.
Licensed California contractor · CSLB #1098432 · Bay Area desk · city-by-city review
About JADU Builder in Bay Area
We deliver JADUs across SF, Oakland, Berkeley, San Jose, Fremont, and Peninsula cities — typical project $110K–$180K all-in.
What we resolve before drawings begin.
- 01
Owner-occupancy
Bay Area JADUs require the owner to occupy either the primary residence or the JADU. We document this during permit application.
- 02
Efficiency kitchen rules
JADU kitchens follow state and local efficiency-kitchen rules — limited counter, limited appliances. We design within these from day one.
- 03
City-by-city interpretation
Some Bay cities interpret JADU rules tightly; others are flexible. We pre-clear interpretation with the planner before drawings start.
Other Bay Area services.
All Bay Area services →Bay Area · JADU Builder FAQ
Questions Bay Area homeowners ask first.
Start a Bay Area JADU brief. We'll review your city's interpretation, kitchenette layout, and how a JADU pairs with a detached ADU on your lot.
Can I have both a JADU and an ADU on my Bay Area lot?
Yes — California state law allows one JADU + one ADU on every single-family lot. Many Bay Area homeowners build both for combined rental income.What does a Bay Area JADU cost?
Most Bay Area JADUs land $110K–$180K all-in, depending on city, kitchenette layout, and whether a new bathroom is added.How long does a Bay Area JADU take?
8–12 months brief-to-keys, depending on the city's review speed.
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