San Jose ADU Regulation Guide

A guide to learning more about ADU regulation and zoning in San Jose, CA. San Jose is the cultural, financial, and political center of Silicon Valley and the largest city in Northern California.

San Jose has been one of the most progressive cities in California when it comes to ADU development, with policies designed to encourage new ADU construction.

San Jose allows detached ADUs up to 1,200 square feet. Junior ADUs (JADUs) up to 500 square feet are also permitted within existing structures.

The city has eliminated parking requirements for ADUs and offers reduced fees for units under 750 square feet. Impact fees are waived entirely for JADUs.

San Jose's planning department offers pre-approved ADU plans that can significantly reduce review times and design costs.

ADORE Homes has built dozens of ADUs across San Jose and understands the city's specific requirements, neighborhood considerations, and inspection processes.