3434 18th St, San Francisco
5 home-service permits on record at 3434 18th St, San Francisco; the roof was last permitted on Jul 13, 2018 at a declared value of $42,400.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Jan 5, 2022 | additions alterations or repairs: proposed conversion of garage into 3 accessory dwelling units. includes structural, mechanical, electrical, & plumbing work. addition of dwelling units per ordinance nos. 162-16, 95-17 & 162-17 | Plumbing | $600,000 | — | Finaled Sep 11, 2023 | 202108096059 |
| Nov 5, 2021 | additions alterations or repairs: interior remodels of units 1, 2, 3, 4, 5, 6, 7 & 8 and common areas. includes mechanical, electrical and plumbing work. no structural work. executive directive 13-01 privately funded | Plumbing | $360,000 | — | Finaled Sep 11, 2023 | 202108045708 |
| Jul 13, 2018 | ReRoof: reroofing | Roofing | $42,400 | — | Finaled Aug 17, 2018 | 201807134508 |
| Feb 14, 2018 | otc alterations permit: new roofing, replacing existing roofing in kind | Roofing | $56,250 | — | issued | 201709269641 |
| Feb 14, 2018 | otc alterations permit: minor mechanical work - furnace replacement, minor electrical work. ref pa #201708033734. n/a maher ordinance | Heating and cooling | $16,000 | — | issued | 201708033847 |
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.