ADU Rules by Location

Accessory dwelling unit rules can change by state, city, county, zoning district, and property condition. Use this hub to find jurisdiction-specific guidance and always verify current requirements with the responsible local agency.

What to verify locally

• Allowed ADU types and number of units
• Maximum size and height
• Setbacks and lot coverage
• Parking requirements
• Owner-occupancy and rental rules
• Fire, utility, access, and impact-fee requirements
• Permit process and review timelines

Each future location guide will identify its jurisdiction, primary sources, and review date so homeowners can see exactly what information was checked.