Garage Conversions: Green Valley vs Tucson
How do garage conversions rules compare between Green Valley, AZ and Tucson, AZ?
Green Valley and Tucson have similar restriction levels.
Green Valley, AZ
Pima County
Converting a garage to living space in unincorporated Pima County requires a building permit from Development Services. The conversion must meet residential building code for habitable space including insulation, ventilation, egress windows, and ceiling height. Replacement off-street parking may be required by the zoning code.
View full Green Valley rules →Tucson, AZ
Pima County
Garage conversions in Tucson must comply with the Building Code (IRC as adopted) and, if used as a separate dwelling, with UDC Section 6.6.3 (Accessory Dwelling Units), as amended October 22, 2024 (effective November 21, 2024) to comply with Arizona HB 2720. ADUs are limited to 75% of the principal dwelling's gross floor area, capped at 1,000 sq ft, with a 650 sq ft floor regardless of principal size. Minimum side and rear setbacks are 5 feet, no on-site parking is required, and the design need not match the principal dwelling.
View full Tucson rules →Key Facts Comparison
| Fact | Green Valley | Tucson |
|---|---|---|
| Permit | Building permit required | - |
| Ceiling Height | Minimum 7 feet | - |
| Egress Windows | Required for habitable space | - |
| Parking | Must maintain 2 off-street spaces | Not required for an ADU |
| Final Inspection | Required before occupancy | - |
| ADU Section | - | Tucson UDC Sec. 6.6.3 |
| Effective Date (HB 2720 update) | - | Nov 21, 2024 (adopted Oct 22, 2024) |
| Max ADU Size | - | 75% of principal GFA, up to 1,000 sq ft |
| Minimum ADU Allowance | - | 650 sq ft regardless of principal size |
| Min Side/Rear Setback | - | 5 ft |
Highlighted rows indicate differences between cities.
Green Valley FAQ
Can I convert my garage to a bedroom?
Yes, with a building permit from Pima County Development Services. The conversion must meet residential code for habitable space including ceiling height, egress windows, insulation, and ventilation.
Will I need to provide replacement parking?
Likely yes. Pima County zoning typically requires 2 off-street parking spaces per dwelling. You may need to demonstrate alternative paved parking if converting a garage.
Tucson FAQ
Do I need a permit to convert my garage in Tucson?
Yes. Any conversion of a garage to habitable space requires building, electrical, mechanical, and plumbing permits from Tucson Planning and Development Services. Plans must comply with the International Residential Code as adopted by the City of Tucson, including egress, ceiling height, alarms, insulation, and electrical/mechanical requirements.
Can I rent out a converted garage as an ADU in Tucson?
Yes, if the unit complies with UDC Section 6.6.3 as amended November 21, 2024 to implement Arizona HB 2720: it must not exceed 75% of the principal dwelling's gross floor area or 1,000 square feet (a 650 sq ft minimum allowance applies regardless of principal size), and side and rear yard setbacks must be at least 5 feet. Off-street parking is not required, and the ADU need not match the design of the main house. For short-term/vacation rental ADUs constructed on or after September 14, 2024, Arizona law allows Tucson to require owner occupancy.
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