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Detached ADUs in San Jose
A small, complete home behind your house: its own foundation, kitchen, bathroom and front door.
Who builds a detached ADU?
Owners who want the most privacy between the two homes: a rental with its own yard, a place for parents, or a home office that can become a rental later.
What does the work include?
- Site survey, design and engineering
- Permits and plan check
- Foundation, framing, roof and windows
- Sewer, water and electrical runs from the main house or the street
- Finishes, inspections and final sign-off
What usually drives the cost?
Size and finishes, then the site: how far the sewer line runs, whether the electrical panel needs an upgrade, and how hard it is to get materials into the back yard.
Preapproved or custom?
San Jose's preapproved list includes factory-built and site-built designs. Some need a site-specific structural submittal, which takes longer than same-day review. We compare a preapproved option with a custom plan for your lot.
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Is your lot ready for an ADU?
Send your address and a sentence about what you want. We look up the zoning, setbacks and utility routes and reply with the ADU types that fit.
We build in San Jose, CA.