751 Duncan St, San Francisco
2 home-service permits on record at 751 Duncan St, San Francisco; the roof was last permitted on Sep 11, 2023 at a declared value of $550,000.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Sep 11, 2023 | additions alterations or repairs: rear horizontal & vertical addition of 550 sq ft per floor, add 3rd story. minor alterations to house to interface w/ addition. new internal stairway, roof deck - less than 500 sq ft. no changes to front facade | Roofing | $550,000 | — | issued | 202111222929 |
| Apr 2, 2019 | otc alterations permit: partial garage conversion to full bathroom. rework of mechanical /electrical/plumbing equipment. new demiging walls and finishes. new electrical fixtures and plumbing equipment. patch and repair finished from work | Plumbing | $15,000 | — | issued | 201903155426 |
On Duncan St
130 permits on record on Duncan St.
| Trade | Permits | Since Oct 2, 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 5,921 one- and two-family reroof permits since October 2, 2024, most declared values run from $7,700 to $32,000 (the middle 80%); the median is $15,000 and half fall between $10,800 and $21,770. 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 292 one- and two-family heating and cooling permits since October 2, 2024, most declared values run from $1 to $224,154 (the middle 80%); the median is $25,098 and half fall between $5,000 and $115,240. 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 2, 2026. Owner names are not shown on any page.