Junior ADU (JADU)
A JADU turns a bedroom, a wing or an attached garage into a small home with its own entrance and an efficiency kitchen. It can share a bathroom with the main house, which keeps the cost down.
Is this the right one?
A parent close by, or you downsize into it and rent the house.
Independence without a second building.
The simplest way to start renting part of the property.
Rules at a glance
The state floor every city must allow. Your city may allow more.
California, 2026
| Rule | What it means |
|---|---|
| Size | Up to 500 sq ft |
| Where | Inside the single-family home, including an attached garage |
| Kitchen | Efficiency kitchen required |
| Entrance | Its own exterior door |
| Owner occupancy | The owner lives in the house or the JADU |
From address to keys
We find the room that converts with the least plumbing work.
Entry, kitchen and the shared or private bath. Usually 3 to 6 weeks.
Typically 4 to 10 weeks.
Typically 6 to 12 weeks.
Plans that fit
Ready-drawn plans we adapt to your lot and your city.
Junior ADU (JADU) questions
Can I have a JADU and an ADU?
Yes. A single-family lot can have both, and often a detached ADU as well.
Does it need its own bathroom?
No. A JADU can share a bathroom with the main house.
Can I rent it out?
Yes, as long as the owner lives in either the main house or the JADU.
Would it fit on your lot?
Send the address. We check whether it fits and what it takes to build.