Tucson building & ADU permits
Recent permit activity, updated continuously.
Tucson, in southern Arizona and home to the University of Arizona, falls under the state's 2024 ADU and middle-housing reforms. Its residential feed carries a structured 'Residential ADU – Casitas' work class, which Igni reads directly to flag accessory-dwelling permits, crediting the City of Tucson as requested.
Igni is tracking 1,410 residential and building permits in Tucson, AZ — including 27 classified accessory-dwelling-unit (ADU) filings. The most active ZIP is 85711. The most recent filing Igni tracked was Aug 4, 2026. All records come from City of Tucson PDSD (ArcGIS), an official government open-data feed, and are refreshed continuously.
1410
Permits tracked
27
ADU permits
19
Distinct ZIP codes
Aug 4, 2026
Newest permit
Recent permits
A sample of the freshest permits in this jurisdiction — ZIP and city only (no street addresses).
| ZIP | Permit type | ADU type | Valuation | Applied |
|---|---|---|---|---|
| 85716 | Residential | — | $84,094 | Jul 27, 2026 |
| 85710 | Residential | — | $6,992 | Jul 27, 2026 |
| 85730 | Residential | — | $332,685 | Jul 30, 2026 |
| 85716 | Residential | — | $120,000 | Jul 30, 2026 |
| 85716 | Residential | — | $120,000 | Jul 30, 2026 |
| 85710 | Residential | — | $5,000 | Aug 3, 2026 |
| 85730 | Residential | — | $18,200 | Aug 3, 2026 |
| 85705 | Residential | — | $310,000 | Aug 3, 2026 |
| 85730 | Residential | — | $0 | Aug 3, 2026 |
| 85745 | Residential | — | $140,000 | Aug 3, 2026 |
| 85712 | Residential | — | $0 | Aug 3, 2026 |
| 85710 | Residential | — | $0 | Aug 3, 2026 |
| 85716 | Residential | — | $0 | Aug 3, 2026 |
| 85710 | Residential | — | $0 | Aug 3, 2026 |
| 85747 | Residential | — | $0 | Aug 3, 2026 |
| 85710 | Residential | — | $0 | Aug 3, 2026 |
| 85710 | Residential | — | $0 | Aug 3, 2026 |
| 85747 | Residential | — | $0 | Aug 3, 2026 |
| 85719 | Residential | Detached ADU | $230,000 | Aug 3, 2026 |
| 85711 | Residential | — | $5,000 | Aug 3, 2026 |
Top ZIP codes by recent activity
ADU types in the recent set
Housing law — Arizona
Arizona's HB 2720 (2024) requires municipalities with more than 75,000 residents to permit at least one accessory dwelling unit on lots where single-family homes are allowed; cities that did not adopt conforming rules by January 1, 2025 must allow ADUs on all residential lots.
Arizona's HB 2721 (2024) requires cities over 75,000 to allow 'middle housing' — duplexes through fourplexes and townhomes — by right near central business districts, with compliance by January 1, 2026. A separate 'Starter Homes Act' did not become law (vetoed in 2024, stalled in 2025).
Tucson ADU rules
Tucson allows accessory dwelling units — locally branded 'casitas' — across its residential zones, and the Mayor and Council adopted amendments on October 22, 2024 (effective November 21, 2024) that align the city's rules with Arizona's House Bill 2720. The update increased the number of ADUs allowed per lot, changed how maximum size is calculated, adjusted height limits and setbacks, and removed minimum-parking requirements.
A Tucson casita is generally capped at 75 percent of the primary dwelling's gross floor area, up to a maximum of 1,000 square feet; importantly, every qualifying lot may build an ADU of at least 650 square feet regardless of the main home's size. Consistent with HB 2720, the city may not require additional off-street parking or impose an owner-occupancy mandate, and setbacks are limited by state law. Casitas may be detached, attached, or conversions of existing space, and because state law caps how restrictive local rules can be, a casita's height and setback standards are no more limiting than those for a single-family home in the same zone.
To make building easier, Tucson runs a 'Casitas in Tucson' program with permit-ready and pre-approved plan resources that help homeowners shorten design and review time. A code-compliant casita is approved administratively through the building permit rather than a discretionary hearing.
This is an informational summary — verify current rules with the city's planning/permitting department; not legal advice.
See also: Arizona ADU law and what is an ADU?
Data source
Sourced from City of Tucson PDSD (ArcGIS). Public records (credit: City of Tucson).
Nearby cities — Arizona
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Informational only, not legal advice. Headline counts reflect all permits Igni has tracked for this jurisdiction; the table shows recent activity. Housing law changes — verify current statutes before relying on this.