Attached ADUs in San Jose

A new unit built onto your home, sharing a wall with it but with its own door, kitchen and bath.

Stucco house with an arched garden gate and cypress trees

When does attached make sense?

When the back yard is small, when you want to use existing utility connections, or when an addition fits the lot better than a separate cottage.

Open living room with a sofa, coffee table and kitchen beyond

What is different from a detached ADU?

It ties into the house: the roof, the foundation and often the fire separation between the units. That shared wall is designed carefully for sound and fire.

Can part of my house become the ADU?

Yes. Converting existing space, such as a basement or a wing of the house, is often simpler than building new, and state law treats conversions more flexibly on size and setbacks.

Attached units on smaller lots

Where a detached unit does not fit, an addition with its own entry can. Height for an attached ADU follows state minimums or the main home's limit.

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.