447 42nd Ave, San Francisco
1 home-service permit on record at 447 42nd Ave, San Francisco; the roof was last permitted on May 20, 2025 at a declared value of $5,000.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| May 20, 2025 | otc alterations permit: same siding needs to be replaced approx 8x8 square feet, not street visible, add ladder going to roof needs to be removed. ladder is 8ft x 2. to comply nov 202533091. item no 2,3,4,5,6 | Roofing | $5,000 | — | Finaled Aug 22, 2025 | 202505206916 |
On 42nd Ave
233 permits on record on 42nd Ave.
| Trade | Permits | Since Oct 3, 2024 | Median declared | Range | Last |
|---|---|---|---|---|---|
| Roofing | 176 | 36 | $12,000 | $5,500–$19,397 | Jun 26, 2026 |
| Plumbing | 19 | 5 | $60,000 | $26,355–$79,762 | Apr 17, 2026 |
| Water heater | 13 | 4 | — | under 5 | Apr 2, 2026 |
| Electrical | 13 | 3 | — | under 5 | Jul 7, 2025 |
| Heating and cooling | 8 | 1 | — | under 5 | Jun 25, 2026 |
| Solar | 4 | 4 | — | under 5 | Jul 30, 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. 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.