What are the ADU permit requirements in Sacramento?
Sacramento has some of the most ADU friendly regulations in California. Here are the current requirements as of 2026:
Size limits: Detached ADU: Up to 1,200 sq ft Attached ADU: Up to 50% of the primary dwelling (max 1,200 sq ft) Junior ADU (JADU): Up to 500 sq ft (converted from existing space) You can build BOTH an ADU and a JADU on the same property
Setback requirements: Rear and side: 4 feet minimum Front: Must meet existing front setback No setback required for conversion of existing structure
Parking: No additional parking required if within half mile of public transit No parking required for conversions of existing structures Otherwise, 1 space per ADU (can be tandem or in setback areas)
Other requirements: Must connect to city sewer and water Separate entrance required Kitchen, bathroom, and sleeping area required Must meet California Building Code (Title 24 energy, etc.) Fire sprinklers required if primary home has them
Permit process: City of Sacramento: Apply through Community Development Sacramento County: Apply through Planning & Building Plan review: 4 8 weeks typically Impact fees: Waived for ADUs under 750 sq ft School fees: Still apply
Cost tip: The City of Sacramento offers pre approved ADU plans that can speed up permitting significantly.
This information is provided as a general guide for Sacramento area homeowners. Actual costs and requirements may vary based on your specific situation. Always verify contractor licenses at cslb.ca.gov and check with your local building department for current permit requirements.