4315 21st St, San Francisco
2 home-service permits on record at 4315 21st St, San Francisco; the roof was last permitted on Jul 11, 2022 at a declared value of $515,000.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Jul 11, 2022 | additions alterations or repairs: remodel and addition to an single family home. remodel 1st floor interior. replace rear lower sloped roof with flat roof. replace rear at grade deck with deck. remodel 2nd floor bathrooms. replace windows and doors in kind. replace select windows and doors with windows | Roofing | $515,000 | — | Finaled Sep 18, 2023 | 202008202259 |
| Aug 17, 2016 | ReRoof: re-roofing | Roofing | $18,500 | — | Finaled Oct 3, 2016 | 201608175241 |
On 21st St
181 permits on record on 21st St.
| Trade | Permits | Since Oct 4, 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 5,889 one- and two-family reroof permits since October 4, 2024, most declared values run from $7,650 to $32,000 (the middle 80%); the median is $15,000 and half fall between $10,800 and $21,760. 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 4, 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 4, 2026. Owner names are not shown on any page.