San Francisco building & ADU permits
Recent permit activity, updated continuously.
San Francisco's combined city-and-county building department publishes its permits through DataSF under a public-domain (PDDL) license, making it one of the cleaner open-data sources Igni tracks. As a California jurisdiction it operates under the country's most ADU-friendly statewide rules, including ministerial approval and SB-9 lot splits — both flagged in the feed.
Igni is tracking 3,501 residential and building permits in San Francisco, CA — including 47 classified accessory-dwelling-unit (ADU) filings. The most active ZIP is 94110. The most recent filing Igni tracked was Jul 31, 2026. All records come from DataSF — data.sfgov.org (Socrata), an official government open-data feed, and are refreshed continuously.
3501
Permits tracked
47
ADU permits
24
Distinct ZIP codes
Jul 31, 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 |
|---|---|---|---|---|
| 94112 | Other | — | $1 | Jul 31, 2026 |
| 94109 | Residential | — | $15,000 | Jul 31, 2026 |
| 94110 | Residential | — | $25,000 | Jul 31, 2026 |
| 94109 | Residential | — | $35,000 | Jul 31, 2026 |
| 94115 | Commercial | — | $300,000 | Jul 31, 2026 |
| 94131 | Residential | — | $40,000 | Jul 31, 2026 |
| 94121 | Residential | — | $37,000 | Jul 31, 2026 |
| 94122 | Residential | — | $384,000 | Jul 31, 2026 |
| 94132 | Residential | — | $318,000 | Jul 31, 2026 |
| 94118 | Residential | — | $17,500 | Jul 31, 2026 |
| 94134 | Residential | — | $7,200 | Jul 31, 2026 |
| 94105 | Commercial | — | $1 | Jul 31, 2026 |
| 94108 | Commercial | — | $2,200,000 | Jul 31, 2026 |
| 94134 | Residential | — | $10,000 | Jul 31, 2026 |
| 94117 | Residential | — | $12,000 | Jul 31, 2026 |
| 94114 | Residential | — | $1 | Jul 31, 2026 |
| 94114 | Residential | — | $1 | Jul 31, 2026 |
| 94116 | Residential | — | $900 | Jul 31, 2026 |
| 94105 | Commercial | — | $56,000 | Jul 31, 2026 |
| 94107 | Residential | — | $5,000 | Jul 31, 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.
San Francisco ADU rules
San Francisco offers more than one path to building an accessory dwelling unit. Its State ADU Program follows California's ministerial rules — streamlined, exempt from CEQA environmental review, and not subject to the Planning Code's Section 311 neighborhood notification or discretionary review — and is the fastest route for most homeowners. A separate Local ADU Program is discretionary and allows broader waivers for existing buildings but carries the city's tenant protections; a State-Hybrid program serves larger multifamily buildings.
Because so much of San Francisco's housing stock is multifamily, the number of ADUs allowed often depends on the building: a single-family home or a building with up to four units can typically add one interior ADU plus one detached ADU, while larger buildings can add more within the existing envelope. There is no owner-occupancy requirement for ADUs, and parking is generally not required.
San Francisco does not impose a single citywide maximum ADU size; units are instead governed by the building envelope and the state's minimum standards. The Local Program adds protections against displacement — ADUs cannot be built on lots with certain recent no-fault evictions, and waivers granted on a lot with rental units can make the new ADU rent-controlled.
This is an informational summary — verify current rules with the city's planning/permitting department; not legal advice.
See also: California ADU law and what is an ADU?
Data source
Sourced from DataSF — data.sfgov.org (Socrata). PDDL — Open Data Commons Public Domain.
Nearby cities — California
Learn more about ADUs & building permits
Background reading on accessory dwelling units, building permits, and how Igni turns San Francisco permit records into leads.
San Francisco 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.