Converted · ground-floor conversion · Castro/Upper Market
4160 20th St
In progress+1 unit on this lot · now 47 permits
To comply with nov# 202293305. Partial conversion of existing basement level into 530 SF ADU unit.
filed Jul 2022issued Jun 2023 · permit wait 11 months3 years 5 months since issue
waiting for permitconstructionrelated building permitelectrical permitplumbing permit
Declared value
$162,453
declared across 3 permits: the ADU permit plus its sub-permits
Permit wait
11 months
filed → issued
Build time
in progress
issued → completed
Permits in this project
| Permit | What | When | Declared | |
|---|---|---|---|---|
| ADU permit | To comply with nov# 202293305. Partial conversion of existing basement level into 530 SF ADU unit. 202207208951 · White Construction Builders INC | filed Jul 2022 · issued Jun 2023 | $150k | city record |
| Sprinklers | New fire sprinkler system in basement for new ADU partial. Undergroup under separate permit. Ref pa# 202207208951(s). 202411195280 · cites 202207208951 · Aaa Restaurant Fire Control/Dba Aaa Fire | filed Nov 2024 · issued Dec 2024 | $7,453 | city record |
| Sprinklers | Underground water main for fire sprinkler system. Ref pa #2024-1119-5280 & 2022-0720-8951. 202512081188 · cites 202207208951 · Smelly Mel'S Plumbing INC | filed Dec 2025 · issued Dec 2025 | $5,000 | city record |
| Electrical | Kitchen, two dedicated circuits, bathroom 1 dedicated circuit. 3 recepacles. E202309269760 | Sep 26, 2023 → Nov 14, 2023 | — | |
| Electrical | New kitchen and bath for the ADU. E202404253980 | Apr 25, 2024 | — | |
| Plumbing | Work category: 4pa; fire sprinkler installation. PW20250113259 | Jan 13, 2025 → Feb 10, 2025 | — | |
| Plumbing | Work category: 1p; upgrade water service from meter to house. PW20260224861 | Feb 24, 2026 | — |
1 other permit on this lot during the project, not counted
| Other | Kitchen -2 circuits. 1 bath, 1 outlet, repaint bath kitchen, chnage flooring. No exterior work. 202309267443 · Fancy Construction | filed Sep 2023 · issued Sep 2023 · done Mar 2024 | $40k | city record |
Trade permits show what work was done and when; the city does not record who pulled them.
- Lot
- block 3602, lot 055
- Why we call it an ADU
- SF DBI flagged the permit as an ADU.