San Jose, CA

Garage conversion plans in San Jose, CA

Converting an existing garage is usually the cheapest way to add a rentable unit: the slab, walls, and roof already exist, so budgets typically run well under a detached new build. The make-or-break checks are ceiling height (7 ft minimum for habitable rooms), slab condition, and how far utilities have to travel.

California requires ministerial (no-hearing) ADU review with a 60-day approval clock, and an ADU at or under 800 sq ft and 16 ft tall with 4-ft side and rear setbacks cannot be denied for lot coverage, floor-area ratio, or lot size. Local objective standards and utility connections still apply.

Plans that fit this project

Plans are design starting points checked against 2021 IRC geometry rules — not permit documents. Local codes and objective standards in San Jose govern; confirm with your building department or a licensed professional.