450 Irwin St, San Francisco
1 home-service permit on record at 450 Irwin St, San Francisco; the roof was last permitted on Jun 9, 2025 at a declared value of $180,000.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Jun 9, 2025 | otc alterations permit: 2nd/fl: interior tenant improvement of approx. 2004 gsf of the existing use on the second floor, and exterior modifications tot eh roof for the additio of the erv unit to provide make-up air serving the area of the interior renovation | Roofing | $180,000 | — | Finaled Jun 2, 2026 | 202505287353 |
On Irwin St
6 permits on record on Irwin St.
| Trade | Permits | Since Oct 2, 2024 | Median declared | Range | Last |
|---|---|---|---|---|---|
| Roofing | 2 | 1 | — | under 5 | Jun 9, 2025 |
| Electrical | 2 | 2 | — | under 5 | Jun 8, 2026 |
| Plumbing | 2 | 2 | — | under 5 | Jan 20, 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. 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. 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.