ADU Rules in Fresno, California
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ADU Rules in Fresno
Fresno follows California's statewide ADU framework (AB 68, SB 13, AB 881, AB 2221) with local implementation through the Development & Resource Management Department.
Permitted ADU Types
- Detached ADU: A standalone structure on the same lot as the primary dwelling, up to 1,200 sq ft
- Attached ADU: An addition to the primary dwelling, up to 1,200 sq ft
- Junior ADU (JADU): A unit within the existing primary dwelling, up to 500 sq ft
- Garage Conversion: Conversion of an existing garage or accessory structure into a living unit
Both a full ADU and a JADU may be built on a single-family lot.
Size and Dimensional Standards
| Standard | Requirement |
|---|---|
| Maximum ADU Size | 1,200 sq ft |
| Maximum Height | 16 ft (detached) |
| Rear Setback | 4 ft |
| Side Setback | 4 ft |
| Front Setback | Per underlying zone |
Parking Requirements
No additional parking is required for ADUs within half a mile of public transit. Where parking applies, the maximum requirement is one space per ADU. Garage conversions do not require replacement parking.
Permit Process
- Pre-application consultation: Optional meeting with Development & Resource Management staff
- Application submittal: Submit plans and application to the city's building division
- Ministerial review: 60-day review timeline for complete applications
- Building permit: Obtain construction permits upon planning approval
- Final inspection: Complete all required inspections for certificate of occupancy
Fees
ADUs under 750 sq ft are exempt from development impact fees per California state law. Larger ADUs are subject to proportional impact fees based on unit size. Fresno's fees are generally lower than those in coastal California cities.
Key Regulations
- Owner occupancy is not required under state law
- Short-term rentals (under 30 days) of ADUs are prohibited
- ADUs cannot be sold separately from the primary dwelling unless conditions under AB 1033 are met
- Fire sprinklers are not required if the primary dwelling does not have them
- Properties in the Downtown Neighborhoods Specific Plan area may have additional form-based code standards
- Fresno's climate (hot summers) means ADU design should address energy efficiency and cooling requirements under Title 24
More about Fresno Zoning
FAQ
Frequently Asked Questions
What is the maximum ADU size in Fresno?
Detached ADUs in Fresno can be up to 1,200 square feet. Junior ADUs (JADUs) within the primary dwelling are limited to 500 square feet.
How long does ADU permitting take in Fresno?
Under California state law, Fresno must process complete ADU applications within 60 days. The review is ministerial, meaning no public hearing or discretionary approval is required.
Is Fresno a good city for ADU investment?
Fresno offers relatively affordable land and construction costs compared to coastal California cities, making ADU construction more financially accessible. The city's growing rental market and compliance with state ADU laws support ADU development.
Disclaimer: The information on this website is provided for general informational purposes only and does not constitute legal, financial, or professional advice. Always verify current requirements with your local planning department.