3639 20th St, San Francisco
2 home-service permits on record at 3639 20th St, San Francisco; the roof was last permitted on Mar 28, 2019 at a declared value of $280,000.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Mar 28, 2019 | additions alterations or repairs: interior: remove bdrm on 1st flr. relocate bdrm to master bed & bath, lundry/storage @basement @rear.reconfig closets on 2nd flr. structural upgrades. reconfig bath & lvng rm @attic for roof deck. exterior: replace windows @front/side. front doors to remain w/ glazing | Roofing | $280,000 | — | Finaled Dec 17, 2020 | 201705166649 |
| May 2, 2017 | additions alterations or repairs: new storage, laundry, mech rm in e storage space at basement interior layout & modification to unit in 1st fl, expansion of 2nd unit into attic and new interior stairs. exterior work to include new skylights at roof only. scope includes fully automatic sprinkler sys | Roofing | $530,000 | — | Finaled Dec 17, 2020 | 201701106842 |
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.