Garage conversion rules in Avondale, AZ — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Avondale's Zoning Ordinance has no section dedicated to garage conversions, but Section 28-164 requires single-family dwellings to provide an enclosed garage with two interior spaces. Converting a garage to living space removes required covered parking, so the spaces generally must be replaced to stay code-compliant.
Avondale does not publish a standalone garage-conversion ordinance, so conversions are governed by the off-street parking standards in Chapter 28, Article 8 of the Zoning Ordinance plus the City's adopted building code. Section 28-164(a) requires that a single-family dwelling provide an enclosed garage with two interior spaces, plus one visitor parking space per unit where on-street or driveway parking is not available. Because a garage conversion eliminates those two enclosed spaces, the required covered parking generally must be replaced elsewhere on the lot to keep the home conforming. Section 28-164(h) allows carports to substitute for enclosed garages only in limited cases, such as homes that were not originally built with an enclosed garage or homes located in a neighborhood of carport homes. Parking spaces must meet the minimum dimension of 9.5 feet by 20 feet under Section 28-165(a). Any conversion that creates an independent living unit may instead be reviewed as an attached ADU under Section 28-33. Converting a garage into habitable space also requires building permits for electrical, mechanical, egress, and insulation work through Avondale Development Services, and HOA architectural rules may further restrict or prohibit conversions.
Converting a required two-car garage without replacing the covered parking can leave a home short of the Section 28-164 parking requirement, a zoning violation. Performing structural, electrical, or mechanical work without permits can trigger stop-work orders, after-the-fact permits, or an order to restore the garage.
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