120 Seneca Ave, San Francisco
3 home-service permits on record at 120 Seneca Ave, San Francisco; the roof was last permitted on Mar 6, 2024 at a declared value of $2,000.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Mar 6, 2024 | otc alterations permit: revision to permit 202107265080. legalize 72"w x 53"h window at 2/f. legalize 25" x 48" skylight at roof stair penthouse | Roofing | $2,000 | — | issued | 202402155971 |
| Jul 3, 2023 | otc alterations permit: revise bpa#202107265080, extent 1/f & 2/f approx 5'6" to within 30' of rear property line @ 2/f, rear balconies on original permit are removed, sliding doors replaced by windows, 3/f balcony is removed & roof of additiona is deck sim to roof, all other work shown on permit 202107265080 in unchanged | Roofing | $30,000 | — | issued | 202305057253 |
| Mar 10, 2023 | additions alterations or repairs: sb9 - add 3-story adddition at rear of an house. unit will occupy 2nd & 3rd floor of the addition as well as roof deck. addition to unit #1 is approx. 1095 sqft & contains 3 bedroom, 3 bathroom, stair & roof deck. 2nd unit per sb9 of 1190 sqft added to 1st floor. 722 sqft of new construction | Roofing | $570,000 | — | issued | 202107265080 |
On Seneca Ave
13 permits on record on Seneca Ave.
| Trade | Permits | Since Oct 3, 2024 | Median declared | Range | Last |
|---|---|---|---|---|---|
| Roofing | 10 | 1 | — | under 5 | Oct 15, 2025 |
| Electrical | 2 | 1 | — | under 5 | Oct 29, 2025 |
| Heating and cooling | 1 | 0 | — | under 5 | Apr 11, 2017 |
Roof replacement cost in San Francisco
Across 5,896 one- and two-family reroof permits since October 3, 2024, most declared values run from $7,650 to $32,000 (the middle 80%); the median is $15,000 and half fall between $10,788 and $21,763. The lowest on record is $1 and the highest $4,315,170. This address is in that cohort. Every permit behind that range.
Furnace, heat pump or air conditioner replacement cost in San Francisco
Across 291 one- and two-family heating and cooling permits since October 3, 2024, most declared values run from $1 to $224,616 (the middle 80%); the median is $25,196 and half fall between $5,000 and $116,433. The lowest on record is $1 and the highest $1,600,000. This address is in that cohort. Every permit behind that range.
Source
San Francisco Department of Building Inspection, via DataSF, pulled nightly; the assessor roll for the property fields. As of October 3, 2026. Owner names are not shown on any page.