ADU (Accessory Dwelling Unit) Permit in Tucson (2026)
ADU (Accessory Dwelling Unit) permit requirements, fees, and process for Tucson, AZ. Find out if you need a permit and how to apply.
Yes, a ADU (Accessory Dwelling Unit) permit is required in Tucson, AZ.
A ADU (Accessory Dwelling Unit) permit is required in Tucson, AZ. The Tucson Planning and Development Services Department (PDSD) handles permit applications for Tucson. Below you will find the current thresholds, fees, and process for obtaining a adu (accessory dwelling unit) permit in Tucson.
When Is a Permit Required?
When a ADU (Accessory Dwelling Unit) Permit Is Required in Tucson: All ADU construction
Permit Fees
ADU (Accessory Dwelling Unit) Permit Fees in Tucson: $1,500–$8,000 total. Estimated timeline: 3-6 weeks.
Estimated timeline: 3-6 weeks
How to Get a ADU (Accessory Dwelling Unit) Permit in Tucson
Verify whether your project meets the permit threshold in Tucson: All ADU construction.
Prepare your permit application and plans. Contact the Tucson Planning and Development Services Department (PDSD) at https://www.tucsonaz.gov/pdsd for required documentation.
Submit your application online at https://aca.tucsonaz.gov/ or in person at the Tucson Planning and Development Services Department (PDSD).
Pay the permit fee: $1,500–$8,000 total.
Wait for plan check approval. Estimated timeline: 3-6 weeks.
Schedule required inspections through https://www.tucsonaz.gov/pdsd/inspections. All inspections must pass before project is finalized.
Important: Tucson PDSD permit. Updated in 2024 to comply with Arizona HB 2297. Tucson Water connection fees apply. Saguaro cactus relocation permit from AZ Game & Fish may be needed for excavation near cacti.
Tucson Planning and Development Services Department (PDSD)
Phone: (520) 791-5550
Website: https://www.tucsonaz.gov/pdsd
Online Permits: https://aca.tucsonaz.gov/
Hours: Mon-Fri 8:00am-5:00pm (201 N. Stone Ave)
Frequently Asked Questions
Can I build an ADU on my Tucson property?
Yes. Arizona HB 2297 (effective September 2024) requires Tucson to allow ADUs on single-family lots and removed the previous owner-occupancy requirement. Tucson updated its UDC to comply. ADUs can be up to 50% of your primary dwelling floor area or 1,200 sqft (whichever is less). No additional parking is required. Side and rear setbacks cannot exceed 5 feet per state law. University of Arizona proximity creates strong rental demand for ADUs throughout Tucson.
What happens to Saguaro cacti during ADU construction in Tucson?
Saguaro cacti are protected under Arizona Revised Statutes Title 3. If your ADU project requires excavation or grading near Saguaros, you may need a permit from the Arizona Game and Fish Department to relocate them. Saguaro relocation is best done by licensed nurseries with experience moving desert plants. Unpermitted removal carries substantial fines. Have a survey of Saguaro locations done before submitting ADU plans — factor potential relocation costs (typically $500-$2,000 per cactus for licensed relocation) into your project budget.
How does Tucson's summer heat affect ADU construction and energy costs?
Tucson summer temperatures regularly exceed 105°F in June-July, with overnight lows staying above 80°F during heat waves. ADUs must meet Title 24-equivalent Arizona energy codes — enhanced insulation (R-30+ ceilings, R-13+ walls), low-SHGC windows, and high-SEER HVAC are required for habitable comfort and reasonable energy bills. A poorly insulated ADU in Tucson can have $300+ monthly cooling bills in summer. Budget for quality mechanical systems and consider cool roof materials to reduce cooling loads.
What utility company serves my Tucson property for solar?
Most of Tucson is served by Tucson Electric Power (TEP) — separate from Phoenix's APS or SRP service areas. TEP has its own solar interconnection program called the Distributed Energy Resources (DER) program. TEP also offers a Community Solar option called Bright Tucson for customers who can't install rooftop solar. Tucson's excellent solar resource (286+ sunny days/year) and TEP's net metering make solar economically compelling. Contact TEP at (520) 623-7711 or tep.com for solar information.
Is my Tucson property in an historic district?
Tucson has 7 historic districts including the famous Barrio Historico (some of the oldest surviving adobe buildings in the US), El Presidio (near downtown), Armory Park, and West University (near UA campus). Properties in these districts require Historic Preservation Commission approval for exterior modifications visible from the street. Check the district boundaries at tucsonaz.gov/pdsd/historic-preservation. If your property is in an historic district, add 4-6 weeks to your ADU or renovation permit timeline for HP Commission review.
What is the difference between Tucson and Phoenix ADU rules?
Both Tucson and Phoenix follow Arizona HB 2297 partial preemption: no owner-occupancy, 5-foot maximum rear/side setbacks, no extra parking. Key differences: Tucson limits ADU height to one story (20 ft maximum), while Phoenix also limits to single-story. Tucson's permit fees are generally lower than Phoenix given smaller permit volumes. Tucson uses the Unified Development Code (UDC) while Phoenix uses the Phoenix Zoning Ordinance. Tucson is served by Tucson Electric Power (TEP) not APS or SRP. Tucson's rental market is driven by University of Arizona; Phoenix's is broader suburban/employment market.
Source: Tucson Building Code — ADU (Accessory Dwelling Unit) Requirements. Last verified April 6, 2026. View source