Permit GraphShortlistSan Francisco building permits since 2000

Permit 202308285406

2639 21st Av

legalize existing conditioned space as a 1-bedroom accessory dwelling unit(adu). 382 sq ft. per ordinace 95-17

Outcome
Completed (city status: complete, Nov 24, 2025)
Filed
Aug 28, 2023
Permit issued
Apr 19, 2024
Final sign-off
Nov 24, 2025
Declared cost
$10,000
Building use
1 family dwelling
Neighborhood
Sunset/Parkside
Contractor
Dmsquare Construction 2 Inc (license 1074425)
Property
All permits at this address (block 2475, lot 010)

Everyone on the permit

The parties and license numbers written on the permit, as the city lists them; not a check with any state board. The person who paid the fee and the project contact are not shown.

Contractor
Dmsquare Construction 2 Inc (license 1074425)
Owner-builder
Owner Builder
Engineer
Sam Tsui, Tas Consulting Engineers (license C78233)
Authorized agent-others
Tat Cheung, Cheung Sunny T K (no license listed)
Designer
Felix Liu, Lcf Solutions (no license listed), applicant