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National Plumbing is a plumbing contractor with 5 tracked San Francisco building-permit projects on record, with the latest filing in that record 98 days ago. Its filings (Jan 2025 to Dec 2025) are concentrated in Hayes Valley and Outer Mission, 60% residential. A typical project in the record declares $45K–$80K. If you work at National Plumbing, claim this page to add a description.
Filed 98 days ago
#1,120
by SF filing activity
among SF specialty contractors, 90 days to Aug 23, 2026
5
projects
from 22 filings
1/16
active week
weeks with a filing (16 weeks to Aug 23, 2026)
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Permit-backed projects · PermitPipeline’s independent record
$80K Tenderloin commercial renovation
Last active Aug 2025 · National Plumbing: specialty contractor
Work category: 8p; remove heater with from the record; provide and install new dhw unit ( yet known)
GC named · 2 Design firms identified · 3 specialty contractors identified
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$170K Outer Mission single-family renovation
Last active Feb 2025 · National Plumbing: specialty contractor
Work category: 1m; install new hydronic heat system install vent pipe
GC named · Architect identified · Engineer identified · 2 specialty contractors identified
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$60K Hayes Valley multifamily renovation
Last active Jan 2025 · National Plumbing: specialty contractor
Work category: 1m; install mini split heat-pump for adu
GC named · 2 specialty contractors identified
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2 more
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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 names and mailing addresses, and full filing histories are part of the paid product.
5 project records for National Plumbing: addresses, values, project teams
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Typical project$45K–$80K$60K typicalLast filed98 days agoTenderloin · Jun 11, 2026Last 90 days1 active0 newly filed
Filing activity · 16 weeks to Aug 23, 2026 · peak Jun 2026
MAY
JUN
JUL
AUG
Project mix · by use
Commercial40%
Residential60%
Geography · by neighborhood
Hayes Valley20%
Outer Mission20%
Sunset/Parkside20%
Tenderloin20%
West of Twin Peaks20%
Shared-project connections
| # | Firm | Primary role | Shared | Relative |
|---|---|---|---|---|
| 1 | Lawrence Liao STR. Eng | Architecture | 1 | |
| 2 | MML Architect | Architecture | 1 | |
| 3 | RKD Consulting Corp | Architecture | 1 | |
| 1 | Y & C Electrical.Inc | General contractor | 2 | |
| 2 | Maxg Construction Inc (Maxwell M Ghobadi | General contractor | 1 | |
| 3 | WD Fire Protection Inc | General contractor | 1 | |
| 4 | Tai Lam Mak | General contractor | 1 | |
| 5 | Fault Line Plumbing Inc | General contractor | 1 |
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Owner and developer names, and the projects behind each connection, are part of the Leads product.
Firms that appear on the same San Francisco permit filings. Association on shared filings, not a proven working relationship.
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State licenseNot connectedTrade licenses are held by BPELSG. That register is not part of the San Francisco permit record, and we do not yet read it.
Repeat working relationships1 firmFirms this one appears with on more than one project, out of 11 in total.
Permit speed—Too few filings with a recorded issue date to publish a median.
Frequently asked questions
How many SF projects does National Plumbing appear on?▾
PermitPipeline tracks 5 San Francisco building-permit projects for National Plumbing (Jan 2025 to Dec 2025). 1 had filing activity in the last 90 days.
Does National Plumbing work on commercial or residential projects?▾
Across its tracked San Francisco filings, 40% of National Plumbing's projects are commercial and 60% are residential (multifamily, small residential, or single-family). Based on permit records, not self-reported.
Where in San Francisco does National Plumbing work?▾
20% of National Plumbing's tracked San Francisco projects are in Hayes Valley.
What is a typical National Plumbing project worth?▾
The median declared value across the 5 San Francisco projects National Plumbing has on record that state one is $60K (declared value on the permit filing, not contract value).
Which firms appear most often on the same filings as National Plumbing?▾
National Plumbing most frequently appears on the same San Francisco permit filings as Y & C Electrical.Inc, Lawrence Liao STR. Eng, Maxg Construction Inc (Maxwell M Ghobadi. Appearing together indicates association on shared filings, not a proven working relationship.
Is National Plumbing a plumbing contractor?▾
National Plumbing is listed as a plumbing contractor on its San Francisco permit filings. Roles on this profile are derived from the role each firm holds on public SF DBI filings.
Public aggregate — full project records are part of the paid leads product. Ranking, filing activity, project mix and geography were last recomputed Aug 23, 2026. Project counts, declared values and filing dates are read live from SF DBI filings.
How far back does this record go?▾
This page covers the recent permit record, not the firm’s full history. A firm’s earliest filing here means it was already working when our record opens, not that it started then.
Sources
San Francisco Department of Building Inspection permit filings.
Record source
Read directly from SF DBI filings.
Photography
None are shown until the firm supplies them.
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