California law makes ADUs one of the most practical ways to add housing on a residential lot — for family, rental income, or a future caregiver. We handle feasibility, design coordination, permits and construction for garage conversions, attached ADUs and detached backyard units.
What’s included
- Feasibility review — setbacks, utilities, access and lot coverage
- Garage conversions, attached ADUs and detached backyard units
- Foundation, framing and roofing
- Complete kitchen and bathroom fit-out
- Utility connections, including separate services where required
- Permit coordination under California ADU law
Typical timeline
ADUs typically take about 4–8 months end to end, depending on the type of unit and the city review process.
Common questions
How large can an ADU be?
California law generally allows at least 850 sq ft for a one-bedroom and 1,000 sq ft for a two-bedroom ADU, though details vary by city. We check your lot against your city rules at the feasibility stage.
Can I rent out my ADU?
In most Bay Area cities, yes for long-term rental; short-term rental rules vary by city. We flag the local rules during feasibility so there are no surprises later.
Every project starts with a free site visit and a written, itemized proposal. Call (520) 858-9998 or use the estimate form — we serve the San Francisco Bay Area.