12,900 Sq ft. Lot In Fresno, California, the RS-5 zone permitted uses: Detached single-family homes, accessory apartments, and family care facilities Conditional uses: Public utilities, child daycare facilities, and religious institutions Fresno also has zoning laws for accessory dwelling units (ADUs), which can be attached to or detached from the main residence. ADUs must have their own kitchen, bathroom, and sleeping areas, and cannot exceed 1,200 square feet.