20 Alton Av

San Francisco permit 202506058067 · West of Twin Peaks

Addition (type unconfirmed)Over-the-counter, with plansComplete

Street view · Apr 2025

Google Street View of 20 Alton Av, Apr 2025

Scope of work

As written on the permit application.

Horizontal addition for new stairs at 3rd fl. interior remodel. lower floor at media room at ground level to create more ceiling height. 9 (n) windows and 1 (n) sliding door. removal of (e) rear deck

Timeline

Key dates from the city record.

Filed: Jun 5, 2025
Issued: Jul 1, 2025 (within 1 month of filing)
Completed: Sep 29, 2026 (15 months after issuance)

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: 7 stops across 4 departments
Comments issued: None

Review stop	Arrived	Finished	Result
Intake Building Inspection · INTAKE	Jun 5, 2025	Jun 5, 2025	Administrative
Zoning review Planning · CP-ZOC	Jun 5, 2025	Jun 5, 2025	Approved
Mechanical and energy plan review Building Inspection · MECH	Jun 6, 2025	Jun 6, 2025	Approved
Building plan review Building Inspection · BLDG	Jun 10, 2025	Jun 10, 2025	Approved
Fire prevention review Fire Department · SFFD	Jun 13, 2025	Jun 13, 2025	Not Applicable
Public Utilities Commission review Public Utilities · SFPUC	Jun 13, 2025	Jun 13, 2025	Approved
Central Permit Bureau Building Inspection · CPB	Jul 1, 2025	Jul 1, 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: Complete
Estimated cost: $300,000

People named on this permit

Only people we matched to a California license are listed.

Name	Role	License on permit
Brooks Mitchell Mcdonald Brooks Mcdonald Architecture	Architect	C33087
Donald David Double D Engineering	Engineer	S3928

Sources

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

Permit 202506058067 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 Apr 2025