Pasadena building & ADU permits
Recent permit activity, updated continuously.
Pasadena is one of Los Angeles County's densest ADU markets, working under California's ministerial accessory-dwelling rules. The city publishes a rolling layer of currently-active building permits rather than a historical archive — a small file, but the highest share of accessory-dwelling projects of any source Igni tracks.
Igni is tracking 440 residential and building permits in Pasadena, CA — including 198 classified accessory-dwelling-unit (ADU) filings. The most active ZIP is 91104. The most recent filing Igni tracked was Oct 1, 2026. All records come from City of Pasadena (ArcGIS), an official government open-data feed, and are refreshed continuously.
440
Permits tracked
198
ADU permits
6
Distinct ZIP codes
Oct 1, 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 |
|---|---|---|---|---|
| 91103 | Residential | Unknown | — | Sep 30, 2026 |
| 91103 | Residential | Detached ADU | — | Sep 30, 2026 |
| 91106 | Residential | — | — | Sep 29, 2026 |
| 91107 | Residential | Detached ADU | — | Sep 29, 2026 |
| 91103 | Residential | — | — | Sep 29, 2026 |
| 91107 | Residential | — | — | Sep 30, 2026 |
| 91104 | Residential | Garage conversion | — | Sep 28, 2026 |
| 91104 | Residential | — | — | Sep 28, 2026 |
| 91107 | Residential | — | — | Sep 28, 2026 |
| 91107 | Residential | Attached ADU | — | Sep 28, 2026 |
| 91104 | Residential | Attached ADU | — | Sep 28, 2026 |
| 91107 | Residential | — | — | Sep 28, 2026 |
| 91106 | Residential | Garage conversion | — | Sep 28, 2026 |
| 91104 | Residential | — | — | Sep 24, 2026 |
| 91104 | Residential | Attached ADU | — | Sep 24, 2026 |
| 91104 | Residential | — | — | Sep 25, 2026 |
| 91104 | Residential | — | — | Sep 30, 2026 |
| 91104 | Residential | — | — | Sep 28, 2026 |
| 91103 | Residential | Garage conversion | — | Sep 30, 2026 |
| 91104 | Residential | Detached ADU | — | Sep 23, 2026 |
Top ZIP codes by recent activity
ADU types in the recent set
Housing law — California
California mandates ministerial (by-right) approval of accessory dwelling units statewide, with a 60-day decision deadline and one ADU plus one junior ADU allowed on most single-family lots; owner-occupancy is generally not required.
SB 9 allows by-right duplexes and urban lot splits on single-family lots, and newer transit-oriented upzoning (SB 79) phases in from 2026.
Data source
Sourced from City of Pasadena (ArcGIS). Public records (CA CPRA).
Nearby cities — California
Learn more about ADUs & building permits
Background reading on accessory dwelling units, building permits, and how Igni turns Pasadena permit records into leads.
Pasadena 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.