4020 20th St, San Francisco
3 home-service permits on record at 4020 20th St, San Francisco; the roof was last permitted on May 12, 2026 at a declared value of $3,500.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| May 13, 2026 | otc alterations permit: kitchen main floor - replace cabinets, countertops, appliances & sink & fixtures using locations & waste supply lines, electrical systems & locations. work inkind | Electrical | $30,000 | — | Finaled Jun 1, 2026 | 202605131206 |
| May 12, 2026 | ReRoof: garage roof only: re-roofing: install 3 layers of certained feed, sa cap system, 1. layer of nail bas, 1 layer of ply bas, 1 layer of sa cap self adhered, no hot work | Roofing | $3,500 | — | Finaled May 20, 2026 | 202605121106 |
| Mar 31, 2026 | ReRoof: re-roofing: remove and replace roofing material / existing roofing material | Roofing | $33,000 | — | Finaled Jul 10, 2026 | 202603318604 |
On 20th St
230 permits on record on 20th St.
| Trade | Permits | Since Oct 2, 2024 | Median declared | Range | Last |
|---|---|---|---|---|---|
| Roofing | 127 | 29 | $20,000 | $7,452–$43,880 | Sep 8, 2026 |
| Plumbing | 38 | 2 | — | under 5 | Aug 13, 2026 |
| Electrical | 29 | 5 | $20,000 | $7,800–$49,380 | Sep 4, 2026 |
| Heating and cooling | 20 | 2 | — | under 5 | Jan 7, 2026 |
| Solar | 8 | 5 | $32,176 | $13,027–$48,594 | Jul 6, 2026 |
| Water heater | 8 | 3 | — | under 5 | Jun 8, 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. This address is in that cohort. 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. This address is in that cohort. 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.