Housing project
1342 Mason St · San Francisco · Block/lot 0180/043 · What else is happening nearby
Permit issued; work may be underway. Based on 202105100075: city status 'issued'.
As proposed on the most recent active record
The applicant's construction cost estimate on the permit. Not a market or assessed value.
None of these records has changed between our snapshots so far.
addition of one (1) accessory dwelling unit (adu), per state law, to an existing seven (7) unit building; total of 8 units. the proposed adu will be located within existing building envelope at the ground floor.
Applied May 10, 2021 · Issued Mar 7, 2023 · 1 units · valuation $72,672 · 1342 Mason St
Linked because: earliest record in this project
structural alteration per adu project under 202105100075. structural alteration to 2nd fl framing. notch joiste to increase ceiling height of unit 1342c near gridline a. new landing and concrete steps. new wall footing and load bearing shearwall along grid 4
Applied Apr 6, 2023 · Issued Apr 19, 2023 · 1 units · valuation $15,000 · 1342 Mason St
Linked because: same street address, within 3 years of another record here
install a new nfpa 13r aytinatuc wet pipe, fire sprinkler system in one apu only on the first floor only if 4 story building install new dedicated underground fire service 2' copper-k propress fitting. ref pa# 202105100075
Applied Apr 26, 2023 · Issued Aug 1, 2023 · 1 units · valuation $30,970 · 1342 Mason St
| Report year | Record | Type | Entitled | Permitted | Completed | Deed-restricted |
|---|---|---|---|---|---|---|
| 2023 | 202105100075 | ADU · rental | — | 1 | — | — |
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: project · Retrieved Nov 9, 2026 · Each row is one report year. A project moves from entitled to permitted to completed across years, so don't add rows together.
Search by record number: 202105100075, 202304065229, 202304266520
Zoning, assessor links, and the full permit history for the parcel
The city and the State don't publish a single project record, so we group related permits and State housing reports ourselves. This grouping is our inference, not an official record. Each permit shows why it was included.
Linked because: the city's record text cites a permit in this project
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel · Retrieved Nov 14, 2026