ADU Regulations in Fresno, California
As the heart of California's Central Valley, Fresno follows the statewide ADU framework established by AB 68 and AB 881. Fresno's Planning Department reviews ADU applications with attention to the city's specific zoning district requirements, particularly in neighborhoods zoned for single-family residential use.
Below is a summary of the key zoning rules applicable to Accessory Dwelling Units in Fresno as of 2026. Regulations are governed by California's AB 68 (2020), AB 881 (2021), and AB 3182 (2024) which together establish a statewide ADU framework.
| Regulation | Requirement |
|---|---|
| Maximum Size | 1,200 sq ft |
| Property Setbacks | 4 ft rear, 4 ft side |
| Extra Parking Required | Not required |
| Owner Occupancy | Required |
Additional Local Requirements for Fresno
- Junior ADUs (JADU) allowed up to 500 sq ft
- Minimum ADU size: 150 sq ft
- Owner occupancy REQUIRED (AB 3182)
- Building permit required
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Can I build an ADU in Fresno?
Fresno permits ADUs in all residential zones following California state law. Check with the Fresno Planning Department for specific lot coverage limits.
How big can my ADU be in Fresno?
What is the maximum ADU size allowed in Fresno? ADUs in Fresno can be up to 1,200 square feet, subject to the property's zoning and lot coverage limits. Always confirm the exact allowed size with the Fresno planning department before designing your project.
What about setbacks and other requirements in Fresno?
What are the setback requirements for an ADU in Fresno? ADUs in Fresno generally require setbacks of 4 ft rear, 4 ft side. California state law (AB 68) limits local setback requirements to 4 feet for existing structures, but always verify with local zoning.