470 Duncan St, San Francisco
1 home-service permit on record at 470 Duncan St, San Francisco; no roofing permit on record.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Apr 10, 2015 | otc alterations permit: excavation of exterior gr at rear for new below grade patio. excavation of int floor to provide additional head clearance. new rooms with new rear doors and windows. replacement of furnace and water heater | Water heater | $98,000 | — | Finaled Dec 15, 2015 | 201502249206 |
On Duncan St
130 permits on record on Duncan St.
| Trade | Permits | Since Oct 3, 2024 | Median declared | Range | Last |
|---|---|---|---|---|---|
| Roofing | 97 | 16 | $15,875 | $7,250–$61,600 | Jul 23, 2026 |
| Plumbing | 21 | 4 | — | under 5 | Jul 16, 2026 |
| Electrical | 5 | 0 | — | under 5 | Jun 29, 2021 |
| Heating and cooling | 4 | 0 | — | under 5 | May 9, 2018 |
| Water heater | 2 | 0 | — | under 5 | Aug 15, 2024 |
| Solar | 1 | 1 | — | under 5 | Feb 13, 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.