20 Walnut St, San Francisco
4 home-service permits on record at 20 Walnut St, San Francisco; the roof was last permitted on Aug 14, 2023 at a declared value of $285,000.
Home-service permits on record at this address
| Issued | Work | Trade | Declared value | Contractor as filed | Status | Permit |
|---|---|---|---|---|---|---|
| Aug 14, 2023 | otc alterations permit: 1st fl: remove gas fireplace, add new gas fireplace. raise head height at window. 2nd fl: add flue for new 1st fl gas fireplace. new office doors. 3rd fl: cut out opening in roof for new recessed family room window. add new folding door system. add new chimney, add new coffee bar. remove | Roofing | $285,000 | — | Finaled Aug 16, 2024 | 202308073899 |
| Mar 6, 2018 | otc alterations permit: level three add roof deck- 12'-6"x11'-3". no changes at basement level, level one, and level 2 | Roofing | $65,000 | — | Finaled Dec 20, 2018 | 201801088024 |
| Feb 15, 2018 | otc alterations permit: revision to 201712045342 basemenet level - relocate bathroom, relocate mechanical, conditioning 171 sf of space, new electrical. excavate less than 30 yards, max ht 5' | Electrical | $40,000 | — | Finaled Dec 20, 2018 | 201802151346 |
| Nov 29, 2017 | otc alterations permit: basement no work. 1st level - remodel kitchen in-kind, relocate powder room, new electrical; level 2 - remodel 3 bathrooms in-kind, new electrical; level 3 - washer & dryer relocated from basement, new electrical | Electrical | $210,000 | — | Finaled Dec 20, 2018 | 201711284970 |
On Walnut St
27 permits on record on Walnut St.
| Trade | Permits | Since Oct 2, 2024 | Median declared | Range | Last |
|---|---|---|---|---|---|
| Roofing | 23 | 5 | $11,700 | $5,900–$22,393 | Oct 7, 2025 |
| Electrical | 3 | 1 | — | under 5 | Mar 30, 2026 |
| Plumbing | 1 | 1 | — | under 5 | Mar 6, 2025 |
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.