William Liang
Engineering firm · San Francisco permit activity
Engineering firm active in San Francisco construction, tracked from public building-permit filings.
#198
by NYC filing activity
among NYC architects & engineers, last 90 days
18
project records
Feb 2025 to Jul 2026
3/16
active weeks
weeks with a filing (last 16)
18 projects
Scopes, declared values and this firm's role on each one
See 18 projects involving William Liang
Recent projects involving this firm
Outer Richmond
Revision to 202511260478. reconfigure layout of family room, kitchenette, excercise area and…
$156K
Outer Richmond
Demolish unpermitted rear deck & stairs and rebuild 3rd floor deck and stairs to rear yard…
$20K
Sunset/Parkside
G/f only: add laundry room. at (e) family room - add kitchenette with 2 burner cooktop and…
$55K
Neighbourhood, filing date, scope and declared value are shown here. Exact addresses, full filing histories and project teams are part of the paid product.
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18 project records for William Liang: addresses, values, project teams
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Middle 50% of declared values: $25K–$150K (median $66K)
Most recent filing: Outer Richmond · Jul 10, 2026
3 active · 2 newly observed last 90 days
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Filing activity · last 16 weeks
APR
MAY
JUN
JUL
3
active projects (last 90d)
2
newly observed (last 90d)
Jun 2026
peak month
Project mix · by use
Residential100%
Geography · by borough
Excelsior39%
Sunset/Parkside23%
Outer Richmond15%
West of Twin Peaks15%
Inner Richmond8%
Shared-project connections
| # | Firm | Primary role | Shared | Relative |
|---|---|---|---|---|
| 1 | William Liang | Engineering | 3 | |
| 2 | Baukunst | Architecture | 2 | |
| 1 | Y L Construction | General contractor | 3 | |
| 2 | Bingo Builders | General contractor | 2 | |
| 3 | Q & Qq Construction Inc | General contractor | 2 | |
| 4 | B W H Builder Inc. | General contractor | 1 | |
| 5 | Thomas Le Construction Inc | General contractor | 1 |
Firms that appear on the same San Francisco permit filings. Association on shared filings, not a proven working relationship.
Frequently asked questions
How many SF projects has William Liang filed?▾
PermitPipeline tracks 18 San Francisco building-permit projects for William Liang (Feb 2025 to Jul 2026). 3 had filing activity in the last 90 days.
Does William Liang work on commercial or residential projects?▾
Across its tracked San Francisco filings, 0% of William Liang's projects are commercial and 100% are residential (multifamily, small residential, or single-family). Based on permit records, not self-reported.
Where in San Francisco does William Liang work?▾
28% of William Liang's tracked San Francisco projects are in Excelsior.
What is a typical William Liang project worth?▾
Across the 29 tracked projects with a declared value, William Liang averages $53K per project (declared value on the permit filing, not contract value).
Which firms does William Liang work with most often?▾
William Liang most frequently appears on the same San Francisco permit filings as William Liang, Y L Construction, Baukunst. Appearing together indicates association on shared filings, not a proven working relationship.
Is William Liang an engineering firm?▾
William Liang is listed as an engineering firm on its San Francisco permit filings. Roles on this profile are derived from the role each firm holds on public DOB filings.
Public aggregate — full project records are part of the paid leads product. Updated daily from SF DBI filings.
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