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William S Duff

Architect · William Duff Architects · San Francisco

Public records

From the licensing board and the city of San Francisco.

The short answer

Licensed?
License activeArchitect C-26772First issued Mar 4, 1997, expires Feb 28, 2027.

Source: DCA license roster, retrieved Nov 5, 2026

Verify on DCA License Search

Any board discipline?
None found.

We searched the California Architects Board enforcement list on Nov 5, 2026.

Worked in San Francisco?
56 permits since 2004, 56 in the last 5 years. Latest filed Nov 26, 2025.
What kind of projects?
Commercial or tenant improvement 28 · Home remodel 9 · Addition 9
How long do their permits take?
Home remodel: within 1 month. City typical for the same review: within 1 month.

Permits filed each year

San Francisco permits by the year they were filed. The last 5 years are in blue.

What are you planning?

Pick your kind of project to see their permits for it.

Permits
74 permits that name William S Duff, newest first, including 18 revisions or supplements that are not counted. Select a permit to see the full record.
FiledProjectOpen
Nov 26, 2025944 Market St

4th floor: tenant improvement of existing 4th floor office space, new interior non-structural partitions. plumbinf, mechanical, electrical uner deferred submittal.

Filed
Dec 2, 202426 Ofarrell St

Revision to pa #202109077889 revise mezzanine framing. clarification notes for city planning purpose about future floor and column finishes. to comply with nov #202181969. add new restroom, adjust ramp and storage room, change occupancy at mezz to b occ. revise stairs, remove lift & dumbwaiter.

Issued
Apr 4, 20242630 Divisadero St

1st floor: interior adjustments to create nw guest room & relocate office room, nw exterior double door & double-hung windows at rear facade in nw guest rm: nw exterior door & casement windw at rear facade in office rm; 2nd fl: removal of extg wall between kitchen & family rm;

Issued
Apr 25, 2023701 03rd St

Revision to pa#201910235416. t.i. of a grd flr bar & restaurant. (n) non structural partitions & finishes, lightings. millwork & kitchen equipment. includes (n) mep work associated w/ project. fire sprinklers is design/built under a separate permit.

Complete
Apr 17, 20231275 Folsom St

Erect one banner on (e) mounts

Cancelled
Nov 19, 2021701 03rd St

Rooftop. rev to pa202105100080 to bar equipment layout. no work to egress componenets, plumbing,mech & electrical are design build and under a separtate permit. f/s is design build under sep permit. maher n/a.

Complete
Sep 13, 20213673 Jackson St

Conversion of (e) unconditioned pool enclosure building to new family room with small addition on connector to main house; remodel of existing kitchen and pantry with new appliances and plumbing fixtures.

Complete
May 25, 202149 Stevenson St

Basement: revision to pa 201910073701. reduced scope from original approved plans. install (n) walk-in coolers, (2) 3-compartment sinks, ventless dishwasher and hand sink. all mep work under separate deferred trade permits

Complete
Sep 16, 20201275 Folsom St

Revision to pa 201912189874. mechanical revisions.

Complete
Jun 5, 20201275 Folsom St

Removal of existing front facade door and replace with new window storefront system

Complete
Dec 18, 20191275 Folsom St

Tenant improvement of a 7,200 sq ft office building. scope includes new hvac and conversion of existing 2nd story to a mezzanine.

Complete
Jun 6, 20191275 Folsom St

Change of use/change of occupanct only. wholesale sales to design professional/office. mercantile to business t.i. under separate permit.(mezzanine plan)

Complete
Apr 30, 2019450 Hayes St

Revision to occupancy calcuation on approved permit #201601207535.

Complete
Jan 10, 2019944 Market St

Temant improvement of (e) lobbies on 3rd & 4th floors. new interior finishes and lighting. provide door actuator at entrance door.

Cancelled
Dec 28, 2018190 Lombard St

Open closet

Issued
Apr 6, 2018845 Market St

Space 195 - ti of an existing ground floor level shell retail space. new interior non structural partitions and finishes, lighting, millwork restroom and associated mechanical, electrical & plumbing work. fire sprinkler & alarm are design/build under a separate permit. maher n/a

Complete
Feb 5, 2018276 05th St

Ti of an extg ground level shell retail space into a restaurant. ref 900 folsom for mep. installation of interior non-structural partitions and finishes, lighting, millwork, kitchen equip/hood, plumbing, mech, and electrical. fire sprinkler, ansul and alarm plans under sep permits. n/a for maher

Complete
Dec 20, 2017999 Brannan St

Install one illuminated single faced wall sign (roof), "dolby family ventures". maher na

Complete
Oct 31, 201755 Ashbury Tr

Revision to 201708104503: new skylight in bathroom, new fire rated window in master bath.

Complete
Oct 12, 2017999 Brannan St

Ref pa 2016-0718-2636 restore 1 hr fire rating on original cantilevered moment frame per bldg inspector jeff barnes. special inspection required.product used is flame off (spracy on finish) fire rate paint, product name is flameoff fire barrier paint.

Issued

Sources: DataSF i98e-djp9, 3pee-9qhc, retrieved Nov 5, 2026. Names on permits are matched to licenses by license number and name; unmatched records are not shown.

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