3491 20th St, San Francisco
4 home-service permits on record at 3491 20th St, San Francisco; the roof was last permitted on Feb 23, 2022 at a declared value of $64,500.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Feb 23, 2022 | ReRoof: reroofing, remove the main top flat roof and middle lower roof and install modified bitumen with 2 layers of base | Roofing | $64,500 | — | issued | 202202238537 |
| Sep 7, 2017 | otc alterations permit: replace non-gfci controlled receptacles in kitchen & bath, to comply with nov 201409753, electrical only on 2/f | Electrical | $1,700 | — | Finaled Dec 12, 2017 | 201709077158 |
| Nov 30, 2016 | otc alterations permit: comply with nov 201622293 for window replacement at rear and removal of entire fence at roof. u factor 0.32 max | Roofing | $4,000 | — | Finaled Dec 6, 2016 | 201611223325 |
| Oct 11, 2016 | otc alterations permit: remove 1 hvac unit relocate 2 others. elect work will be necessary. both units will be reattached to roof in a safe manner per code. not visible from street | Heating and cooling | $7,000 | — | Finaled Dec 6, 2016 | 201610119858 |
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.