4129 18th St, San Francisco
1 home-service permit on record at 4129 18th 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 |
|---|---|---|---|---|---|---|
| Sep 14, 2017 | otc alterations permit: walgreen pharmacy interior t.i. to improve new compounding room within existing room. interior partitions, millwork, electrical work, mechanical, plumbing, and flooring modifications. no change in occupancy | Plumbing | $90,000 | — | Finaled Nov 20, 2017 | 201706129001 |
On 18th St
231 permits on record on 18th St.
| Trade | Permits | Since Oct 8, 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 | 7 | 1 | — | under 5 | Oct 5, 2026 |
| Solar | 1 | 0 | — | under 5 | Oct 16, 2017 |
Roof replacement cost in San Francisco
Across 5,851 one- and two-family reroof permits since October 8, 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 $21,800. 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 295 one- and two-family heating and cooling permits since October 8, 2024, most declared values run from $1 to $236,000 (the middle 80%); the median is $25,996 and half fall between $5,000 and $120,250. 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 8, 2026. Owner names are not shown on any page.