William Liang
Engineering firm · San Francisco permit activity
Engineering firm active in San Francisco construction, tracked from public building-permit filings.
#198
by SF filing activity
among SF architects & engineers, last 90 days
18
projects tracked
Feb 2025 to Jul 2026
3/16
active weeks
weeks with a filing (last 16)
1 of the 18 William Liang projects filed new permits in the last 30 days.
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$156K Outer Richmond renovation
Filed 27 days ago · 3 filings · William Liang: engineer
Revision to. reconfigure layout of family room, kitchenette, excercise area and full bath. relocate laundry set-up garage. relocate…
GC named · Engineer identified
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$150K Visitacion Valley renovation
Filed 6 months ago · William Liang: engineer
New 1-story addition at rear with 2-bedrooms and roof deck to (e) sfr
GC named · Architect identified
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$20K Outer Richmond renovation
Filed 1 month ago · William Liang: engineer
Demolish unpermitted rear deck & stairs and rebuild 3rd floor deck and stairs to rear yard conforming to current code
GC named · 1 other firm identified
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15 more
William Liang projects with project intelligence
Scopes, values, teams and filing history for every one
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Neighborhood, filing date, scope and declared value are shown here. Exact addresses,
owner and contact details and full filing histories are part of the paid product.
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
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 neighborhood
Excelsior39%
Sunset/Parkside23%
Outer Richmond15%
West of Twin Peaks15%
Inner Richmond8%
Shared-project connections
| # | Firm | Primary role | Shared | Relative |
|---|---|---|---|---|
| 1 | 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 | Jwl 888 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 Y L Construction, Q & Qq Construction Inc, Bingo Builders. 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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