Maricopa County building & ADU permits
Recent permit activity, updated continuously.
Maricopa County covers the unincorporated Phoenix metro — the fringe communities growing fastest around Phoenix, Mesa, Tempe and Gilbert, each of which permits separately. Arizona has no statewide ADU mandate, so accessory-dwelling rules are set locally; the county publishes a residential-only permit layer with clean ZIPs and a work-class field that flags accessory structures.
Igni is tracking 176 residential and building permits in Maricopa County, AZ — including 4 classified accessory-dwelling-unit (ADU) filings. The most active ZIP is 85355. The most recent filing Igni tracked was Aug 16, 2026. All records come from Maricopa County GIS (ArcGIS), an official government open-data feed, and are refreshed continuously.
176
Permits tracked
4
ADU permits
36
Distinct ZIP codes
Aug 16, 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 |
|---|---|---|---|---|
| 85355 | Residential | — | — | Aug 7, 2026 |
| 85207 | Residential | — | — | Aug 7, 2026 |
| 85331 | Residential | — | — | Aug 7, 2026 |
| 85375 | Residential | — | — | Aug 7, 2026 |
| 85326 | Residential | — | — | Aug 7, 2026 |
| 85331 | Residential | — | — | Aug 7, 2026 |
| 85355 | Residential | — | — | Aug 7, 2026 |
| 85298 | Residential | — | — | Aug 7, 2026 |
| 85249 | Residential | — | — | Aug 8, 2026 |
| 85361 | Residential | — | — | Aug 8, 2026 |
| 85355 | Residential | — | — | Aug 8, 2026 |
| 85355 | Residential | — | — | Aug 8, 2026 |
| 85322 | Residential | — | — | Aug 8, 2026 |
| 85249 | Residential | — | — | Aug 9, 2026 |
| 85326 | Residential | — | — | Aug 9, 2026 |
| 85354 | Residential | — | — | Aug 10, 2026 |
| 85351 | Residential | — | — | Aug 10, 2026 |
| 85373 | Residential | — | — | Aug 10, 2026 |
| 85085 | Residential | — | — | Aug 10, 2026 |
| 85340 | Residential | — | — | Aug 10, 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).
Data source
Sourced from Maricopa County GIS (ArcGIS). Public records (AZ).
Nearby cities — Arizona
Learn more about ADUs & building permits
Background reading on accessory dwelling units, building permits, and how Igni turns Maricopa County permit records into leads.
Maricopa County permit data — FAQ
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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.