420 Folsom St, San Francisco
4 home-service permits on record at 420 Folsom 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 |
|---|---|---|---|---|---|---|
| May 19, 2021 | sign - erect: install 2 electric single-faced wall sign "blue stone lane" | Electrical | $10,000 | — | issued | 202002184609 |
| Jan 31, 2020 | otc alterations permit: fire alarm work for the bluestone lane remodel on floor 1, additions are 2 duct detedtors, 2 modules, 5 speaker strobes. ref 201905171039 | Heating and cooling | $7,300 | — | Finaled Apr 27, 2021 | 202001313221 |
| Nov 14, 2019 | otc alterations permit: revision to 201905171039 installation of i\new int partitions, finishes, furniture, millwork & equip. mep, mech will consist of a disfuser, duct installation, ele work 0 newpower/data along with lighting | Heating and cooling | $1 | — | Finaled Apr 28, 2021 | 201908128540 |
| Jul 25, 2019 | otc alterations permit: interior altertation for new tenant with existing shell building, new interior partitions, finishes fixtures, furniture, millwork, equipment, mep work included, diffuser & duct install power data & lighting througout, new plumbing fixtures n/a maher | Heating and cooling | $225,000 | — | Finaled Apr 28, 2021 | 201905171039 |
On Folsom St
536 permits on record on Folsom St.
| Trade | Permits | Since Oct 4, 2024 | Median declared | Range | Last |
|---|---|---|---|---|---|
| Roofing | 224 | 52 | $18,000 | $7,030–$167,602 | Sep 9, 2026 |
| Electrical | 113 | 19 | $25,000 | $1,340–$280,000 | Sep 28, 2026 |
| Heating and cooling | 105 | 15 | $100,000 | $5,030–$660,000 | Jul 28, 2026 |
| Plumbing | 76 | 12 | $52,096 | $1–$487,427 | Sep 10, 2026 |
| Water heater | 12 | 2 | — | under 5 | Jul 10, 2026 |
| Solar | 6 | 1 | — | under 5 | Jun 16, 2026 |
Roof replacement cost in San Francisco
Across 5,889 one- and two-family reroof permits since October 4, 2024, most declared values run from $7,650 to $32,000 (the middle 80%); the median is $15,000 and half fall between $10,800 and $21,760. 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 4, 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 4, 2026. Owner names are not shown on any page.