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Davis Yiucheung Ko

Architect · Davis Ko Architects · San Ramon

Public records

From the licensing board and the city of San Francisco.

The short answer

Licensed?
License activeArchitect C-22090First issued Mar 15, 1991, expires Oct 31, 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?
38 permits since 2016, 38 in the last 5 years. Latest filed Oct 29, 2026.
What kind of projects?
Commercial or tenant improvement 30 · Addition 2 · Legalize or fix a violation 2
How long do their permits take?
Commercial or tenant improvement: 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.

Commercial or tenant improvement: 30 permits in San Francisco

From 2018 to 2026, latest filed Oct 29, 2026.

Time to get a permit

Theirs
Within 1 month
City
Within 1 month

Median from filing to permit, from 27 issued permits filed since 1966; 1 still in review. City is the San Francisco median for the same kind of review, from 14,474 permits.

Where

  • Russian Hill5
  • Chinatown4
  • Inner Sunset4
  • Inner Richmond3

Most recent

Permits
42 permits that name Davis Yiucheung Ko, newest first, including 4 revisions or supplements that are not counted. Select a permit to see the full record.
FiledProjectOpen
Oct 29, 2026610 Kearny St

Work to consist of barrier removal & new floor hatch to basement. lower (e) floor to accommodate accessible entrance, new accessible restroom. future tenant to provide wall, floor, & ceiling finishes as required.

Filed
Sep 14, 20261228 Sutter St

Revision to pa# 202605292126: remove treatment room from approved plans.

Issued
May 29, 20261228 Sutter St

T.i work to convert (e) ground floor office to new day spa and beauty studio.

Issued
Mar 29, 20245822 Geary Bl

To comply with awning amnesty program - fabric covering: "city spine center". ref awning permit 202403298915.

Complete
Mar 29, 20245822 Geary Bl

To comply with awning amesty program.

Complete
Sep 8, 20235125 Mission St

To comply with accessible business entry program ordinance 51-16. provide new accessible entry w/ power door operator. abe# 202206211568

Issued
Aug 24, 20231816 Haight St

Abe#201901043970. to comply w/ abe program ord 51-16. replace entrance door w/ install new power door operator.

Issued
Aug 24, 20231800 Haight St

To comply w/ accessible business entry program ordinance 51-16. re-stripe and regrade ada parking stall. access aisle and accessible route to building entry. abe#201901043973

Issued
Jul 11, 2023615 Sansome St

Change of use on 3rd floor. t.i space to new massage establishment. electrical & mechanical are being dererred.

Complete
Jul 7, 20234401 Cabrillo St

Unit a: to comply with accessible business entry program, ordinance 51-16. remove (e) pair of entrance door and replace with one accessible entry door with power door operator. abe# 201806130655.

Complete
May 2, 2023507 Oxford St

Construct new deck at first floor with stairs to rear yard

Complete
Apr 6, 20233929 California St

To comply w/ accessible business entry program abe# 201812313680, ordinance 51-16, install power door operator.

Complete
Jan 27, 2023150 West Portal Av

To comply w/ accessible business entry ordinance 51-16, abe # 202204270588, provide new accessible entry w/ power door operator, provide new ada restroom signage, on existing unisex restroom.

Cancelled
Dec 29, 2022612 Kearny St

Comply with accessible business entry program abe: 202002212204 ord 51-16. provide new accessible entrance with power door operator. install new accessible counter.

Complete
Dec 27, 2022763 27th Av

Alteration to 2-story single family house. infill light well to increase floor area at ground floor garage and kitchen on second floor. remodel kitchen. at garage, extend concrete retaining wall about 10 feet further towards the rear of building.

Filed
Dec 27, 20221315 Powell St

To comply w/ accessible business entry program abe 201912129751, ordinace 15-16, remove existing entrance and provide new accessible entrance with power door operator.

Cancelled
Dec 27, 20222018 Lombard St

To comply w/ accessible business entry program abe 202203250073, ordinace 15-16, provide new accessible entrance with power door operator.

Complete
Nov 15, 2022501 Irving St

To comply with accessible business entrance program per ordinance 51-16. abe#202208313588. provide new accessible entrance with power door operator

Complete
Nov 15, 20223329 Balboa St

To comply with accessible business entrance program per ordinance 51-16. abe#202203093351. provide power door operator. abe #202203093351

Complete
Aug 30, 20222470 32nd Av

Comply with nov 202289653. remove two unpermitted bedrooms and bathroom on ground floor.

Complete

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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