Fresno ADU Zoning Rules & Permit Guide

ADU Regulations in Fresno, California

Updated September 29, 2026

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.

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

Frequently Asked Questions About ADUs in Fresno

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.

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 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.