Junior ADU (JADU) Conversion in Palo Alto
Convert existing space inside your primary home into a code-compliant Junior ADU with a kitchenette.
The Lowest-Cost Way to Add a Legal Second Unit
A Junior ADU (JADU) is a unit of up to 500 sq ft created entirely within the existing walls of your primary home — most often converting a bedroom-plus-adjacent-space into a self-contained suite with an efficiency kitchen and its own entrance, while sharing a bathroom with the main house or adding a small one.
Because a JADU does not add square footage to the building envelope, it is typically the fastest and least expensive ADU type to permit and build, and it is exempt from several fees and requirements that apply to detached and attached ADUs.
- Uses existing space inside your home — no new foundation or roof
- Efficiency kitchen (cooktop, sink, small fridge) required by code
- Can share a bathroom with the main home or have its own
- Owner-occupancy of the primary home may be required — we confirm current rules
Frequently Asked Questions
What is the difference between a JADU and an ADU?
A JADU is up to 500 sq ft, built entirely within your existing home's walls, and requires only an efficiency kitchen. A full ADU can be a separate structure with a complete kitchen and is typically larger.
How much does a JADU conversion cost?
JADU conversions typically run $65,000 to $120,000 depending on existing layout and finish level, since the structural shell is already in place. We give a firm quote after a walk-through.
Do I have to live in the house to have a JADU?
California law has historically required owner-occupancy for JADUs (in the main house or the JADU itself). We can confirm the exact current requirement for your property before you commit.
Can I have both a JADU and an ADU on the same lot?
In many cases yes — state law allows a JADU and an ADU on the same single-family lot together. We evaluate your specific lot to confirm.