Converted · ground-floor conversion · Bernal Heights
4100 Folsom St
Completed Aug 2025+1 unit on this lot · now 23 permits
Add ADU unit at ground floor per government code section 65852. 2. New rear deck, remodel interior staircase and 2nd floor closet, new rear spiral staircase to 2nd floor, 2nd floor bathroom remodel, new double door to existing closet.
filed Nov 2021issued Jul 2024 · permit wait 2 years 8 monthscompleted Aug 2025 · built in 1 year 1 month
waiting for permitconstructionrelated building permitelectrical permitplumbing permit
Declared value
$358,491 + other work
the permit also covers work unrelated to the ADU, so this is not an ADU price
Permit wait
2 years 8 months
filed → issued
Build time
1 year 1 month
issued → completed
Builder
No contractor listed
Permits in this project
| Permit | What | When | Declared | |
|---|---|---|---|---|
| ADU permit | Add ADU unit at ground floor per government code section 65852. 2. New rear deck, remodel interior staircase and 2nd floor closet, new rear spiral staircase to 2nd floor, 2nd floor bathroom remodel, new double door to existing closet. 202111031758 | filed Nov 2021 · issued Jul 2024 · done Aug 2025 | $358k | city record |
| Electrical | Upgrade existing panel to 200 amp, wire new ADU, rewire existing bathroom. (4) - #12/20a feeder. 10 lighs, 8 switches, 16 receptacles, 1 fan, 1 d/w, 1 g/d, 1 microwave, 1 range, 2 s/d. E202410297887 | Oct 29, 2024 → Jun 3, 2025 | — | |
| Plumbing | All new plumbing for ADU to be built on lower level. All new plumbing for upstairs bathroom and kitchen. Underground plumbing yes. Ref to bpa# 2021-1103-1758. PP20241030773 | Oct 30, 2024 → Jun 6, 2025 | — |
Trade permits show what work was done and when; the city does not record who pulled them.
- Lot
- block 5739, lot 001
- Why we call it an ADU
- SF DBI flagged the permit as an ADU.