Regulations & Permits

State laws, local rules, and permit timelines demystified

California's ADU regulations have changed dramatically. Here's what setbacks, size limits, owner-occupancy rules, and AB 2221 mean for you.

Navigate the ADU permit process with confidence. We cover pre-application, plan review, inspections, and Certificate of Occupancy.

A Junior ADU (JADU) is an ADU under 500 sq ft inside your primary home. Learn the rules, costs, and when a JADU beats a full ADU.