3447 20th St, San Francisco
2 home-service permits on record at 3447 20th St, San Francisco; the roof was last permitted on Nov 1, 2021 at a declared value of $54,800.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Nov 1, 2021 | ReRoof: reroofing | Roofing | $54,800 | — | Finaled Dec 15, 2022 | 202111011523 |
| Apr 3, 2018 | additions alterations or repairs: add 3rd floor , remodel basement apts and add 1 apt & 3 parking spaces. remodel existing rear stair & add roof deck. sprinkler/alarm deferred | Roofing | $934,523 | — | Finaled Dec 20, 2023 | 201501095338 |
On 20th St
230 permits on record on 20th St.
| Trade | Permits | Since Oct 3, 2024 | Median declared | Range | Last |
|---|---|---|---|---|---|
| Roofing | 127 | 28 | $20,250 | $7,428–$48,320 | Sep 8, 2026 |
| Plumbing | 38 | 2 | — | under 5 | Aug 13, 2026 |
| Electrical | 29 | 5 | $20,000 | $7,800–$49,380 | Sep 4, 2026 |
| Heating and cooling | 20 | 2 | — | under 5 | Jan 7, 2026 |
| Solar | 8 | 5 | $32,176 | $13,027–$48,594 | Jul 6, 2026 |
| Water heater | 8 | 3 | — | under 5 | Jun 8, 2026 |
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. 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. 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.