3100 18th St, San Francisco
2 home-service permits on record at 3100 18th St, San Francisco; the roof was last permitted on Aug 12, 2022 at a declared value of $250,000.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Jun 8, 2023 | otc alterations permit: provide new type i & type ii exhaust systems. install new rooftop package unit and split system heat pump. install new outdoor air fan and makeup air system. ref arch pa# 202206297382 | Heating and cooling | $20,000 | — | issued | 202210315536 |
| Aug 12, 2022 | otc alterations permit: interior remodel: interior partitions, accessible bath. repair existing windows, replace skylights, roof repair, repair less than 50% existing exterior stair in kind, new finishes | Roofing | $250,000 | — | issued | 202206297382 |
On 18th St
230 permits on record on 18th St.
| Trade | Permits | Since Oct 3, 2024 | Median declared | Range | Last |
|---|---|---|---|---|---|
| Roofing | 125 | 23 | $16,700 | $12,270–$65,000 | Sep 22, 2026 |
| Electrical | 35 | 2 | — | under 5 | Jul 20, 2026 |
| Heating and cooling | 33 | 2 | — | under 5 | Jul 30, 2026 |
| Plumbing | 30 | 2 | — | under 5 | Jun 9, 2026 |
| Water heater | 6 | 0 | — | under 5 | Feb 2, 2022 |
| Solar | 1 | 0 | — | under 5 | Oct 16, 2017 |
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. 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. 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.