Warm Zone is a plumbing contractor with 3 tracked San Francisco building-permit projects on record, with the latest filing in that record 79 days ago. Its filings (Mar 2025 to May 2026) are concentrated in Russian Hill and Castro/Upper Market, 100% residential. If you work at Warm Zone, claim this page to add a description.
Filed 79 days ago
#1,598
by SF filing activity
among SF specialty contractors, 90 days to Oct 4, 2026
3
projects
from 10 filings
2/16
active weeks
weeks with a filing (16 weeks to Oct 4, 2026)
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Permit-backed projects · PermitPipeline’s independent record
$32K Castro/Upper Market renovation
Active 4 months ago · 5 filings · Warm Zone: specialty contractor
Work category: 2pb; new sanitary sewer lateral from house trap to garage threshold, pick up floor drain. new gas service from city meter to…
No GC named · Specialty contractor identified
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$8K Russian Hill multifamily renovation
Active 9 months ago · Warm Zone: specialty contractor
Renewal of for final inspection
No GC named · Engineer identified · Specialty contractor identified
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$10K Russian Hill multifamily renovation
Last active Jun 2025 · Warm Zone: specialty contractor
Work category: 8p; provide and install radiant floor space heating system, utilizing: -nti trx 199, 95% efficient, stainless steel, sealed…
No GC named · Engineer identified
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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.
3 project records for Warm Zone: addresses, values, project teams
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Declared values3 on filetoo few for a rangeLast filed79 days agoRussian Hill · Jul 20, 2026Last 90 days1 active0 newly filed
Filing activity · 16 weeks to Oct 4, 2026 · peak Jul 2026
JUN
JUL
AUG
SEP
Project mix · by use
Residential100%
Geography · by neighborhood
Russian Hill67%
Castro/Upper Market33%
Shared-project connections
| # | Firm | Primary role | Shared | Relative |
|---|---|---|---|---|
| 1 | Sattary Structural Engineering | Engineering | 2 | |
| 1 | Nigel Mulgrew Plumbing Inc. | Plumbing contractor | 1 | |
| 2 | LGM Plumbing & Rooter | Plumbing 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 3 in total.
Permit speed—Too few filings with a recorded issue date to publish a median.
Frequently asked questions
How many SF projects does Warm Zone appear on?▾
PermitPipeline tracks 3 San Francisco building-permit projects for Warm Zone (Mar 2025 to May 2026). 1 had filing activity in the last 90 days.
Does Warm Zone work on commercial or residential projects?▾
Across its tracked San Francisco filings, 0% of Warm Zone'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 Warm Zone work?▾
67% of Warm Zone's tracked San Francisco projects are in Russian Hill.
Which firms appear most often on the same filings as Warm Zone?▾
Warm Zone most frequently appears on the same San Francisco permit filings as Sattary Structural Engineering, Nigel Mulgrew Plumbing Inc., LGM Plumbing & Rooter. Appearing together indicates association on shared filings, not a proven working relationship.
Is Warm Zone a plumbing contractor?▾
Warm Zone 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 Oct 4, 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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