3446 21st St, San Francisco
1 home-service permit on record at 3446 21st St, San Francisco; the roof was last permitted on Aug 25, 2017 at a declared value of $850,000.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Aug 25, 2017 | additions alterations or repairs: exterior & interior renovation of 2 units residence. excavation of the lowest level to allow compliant headroom. adjusting location of floor above new foundation. replacement of glazing on rear facade with new windows. new roof deck. legalize 3rd unit per ord 43-14 | Roofing | $850,000 | — | expired | 201612144936 |
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.