3500 21st St

San Francisco permit 202504174601 · Castro/Upper Market

Home remodel (type unconfirmed)Over-the-counter, with plansIssued

Street view · Mar 2025

Google Street View of 3500 21st St, Mar 2025

Scope of work

As written on the permit application.

1/fl- excavation and conversion of non habitiable space to conditioned habitable space. addition of (n) bedroom, laundry room, and office. minor remodel to (e) kitchen and living room at 2/fl. remodel (e) primary closet and (e) office on 3/fl. install (n) skylight in modified roof framing.

Timeline

Key dates from the city record.

Filed: Apr 17, 2025
Issued: Dec 10, 2025 (8 months after filing)
Completed: Not completed yet

For comparison, San Francisco permits with the same review (over-the-counter, with plans) filed in 2025 were typically issued within 1 month (median of 5,178 issued permits).

City plan review

Each review stop the plans went through, from the city's routing record.

Review stops: 11 stops across 5 departments
Comments issued: Twice, by Planning, Building Inspection

Review stop	Arrived	Finished	Result
Intake Building Inspection · INTAKE	Apr 17, 2025	Apr 17, 2025	Administrative
Zoning review Planning · CP-ZOC	Apr 17, 2025	Apr 17, 2025	Issued Comments
Zoning review Planning · CP-ZOC	Jul 2, 2025	Jul 2, 2025	Approved
Permit Center Permit Center · PERMIT-CTR	Jul 7, 2025	Jul 7, 2025	—
Building plan review Building Inspection · BLDG	Aug 1, 2025	Aug 1, 2025	Issued Comments
Zoning review Planning · CP-ZOC	Aug 6, 2025	Aug 6, 2025	Approved
Building plan review Building Inspection · BLDG	Aug 6, 2025	Aug 6, 2025	Approved
Mechanical and energy plan review Building Inspection · MECH	Aug 6, 2025	Aug 6, 2025	Approved
Fire prevention review Fire Department · SFFD	Aug 6, 2025	Aug 6, 2025	Approved
Public Utilities Commission review Public Utilities · SFPUC	Aug 6, 2025	Aug 6, 2025	Approved
Central Permit Bureau Building Inspection · CPB	Dec 2, 2025	Dec 10, 2025	Administrative

Source: DataSF 87xy-gk8d (Building Permit Addenda with Routing), retrieved Nov 6, 2026. Reviewer names and notes are left out.

Permit details

Permit type: OTC alterations permit
Status: Issued
Estimated cost: $257,293

People named on this permit

Only people we matched to a California license are listed.

Name	Role	License on permit
John Git Hoong Lum John Lum Architecture	Architect	C21837

Sources

Everything on this page comes from public records. Check them yourself.

Permit 202504174601 on the city's permit tracking site

San Francisco Department of Building Inspection, the official record

DataSF Building PermitsAddress, scope, cost, dates and status
Retrieved Nov 5, 2026
DataSF Building Permit ContactsArchitects and engineers named on the permit
Retrieved Nov 5, 2026
DataSF Building Permit Addenda with RoutingPlan review stops and results
Retrieved Nov 6, 2026
Google Street ViewStreet photo
Taken Mar 2025