3500 21st St, San Francisco
3 home-service permits on record at 3500 21st St, San Francisco; the roof was last permitted on Dec 10, 2025 at a declared value of $257,293.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Jun 18, 2026 | otc alterations permit: revision to bpa#202504174601. heating & cooling systems changed to 2 outdoor heat pumps with ducted multi-split system. domestic hot water heater revised to be heat pump water heater cf1r, rms-1 doucments updated to reflect these changes | Water heater | $15,000 | — | issued | 202606173378 |
| Dec 10, 2025 | otc alterations permit: 1/fl- excavation and conversion of non habitiable space to conditioned habitable space. addition of bedroom, laundry room, and office. minor remodel to kitchen and living room at 2/fl. remodel primary closet and office on 3/fl. install skylight in modified roof framing | Roofing | $257,293 | — | issued | 202504174601 |
| May 22, 2015 | otc alterations permit: revision to pa#201202154257 to include extension of previously permitted 1/f deck, replace wood windows in kind along 21 street & dolores st sides, new window at previously permitted addition & revise skylight at main roof | Roofing | $9,000 | — | Finaled Jun 29, 2015 | 201404153302 |
On 21st St
181 permits on record on 21st St.
| Trade | Permits | Since Oct 3, 2024 | Median declared | Range | Last |
|---|---|---|---|---|---|
| Roofing | 123 | 21 | $15,000 | $10,000–$257,293 | Jun 18, 2026 |
| Plumbing | 21 | 2 | — | under 5 | Mar 27, 2026 |
| Electrical | 16 | 4 | — | under 5 | Sep 29, 2026 |
| Heating and cooling | 10 | 4 | — | under 5 | Mar 23, 2026 |
| Water heater | 8 | 2 | — | under 5 | Jun 18, 2026 |
| Solar | 3 | 0 | — | under 5 | May 8, 2024 |
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.