3322 Balboa St, San Francisco, CA 94121
Hydro Flow Systems Inc is a plumbing contractor with 4 tracked San Francisco building-permit projects on record, with the latest filing in that record 170 days ago. Its filings (Oct 2025 to Mar 2026) are concentrated in Inner Richmond and Presidio Heights, 100% residential. A typical project in the record declares $2K–$80K. If you work at Hydro Flow Systems Inc, claim this page to add a description.
Filed 170 days ago
#1,706
by SF filing activity
among SF specialty contractors, 90 days to Aug 23, 2026
4
projects
from 20 filings
0/16
active weeks
weeks with a filing (16 weeks to Aug 23, 2026)
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Permit-backed projects · PermitPipeline’s independent record
$80K Inner Richmond single-family renovation
Active 6 months ago · Hydro Flow Systems: specialty contractor
Revision to & e new habitable areas at the 1st floor (family rm, office, bathrm, hallway); (n) windows, opening 1st fl on side facades…
GC named · Architect identified · Design firm identified · Engineer identified · Specialty contractor identified
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Sunset/Parkside single-family renovation
Grade DActive 5 months ago · Hydro Flow Systems: specialty contractor
To obtain final inspection for work approved under,. all work is complete
GC named · Specialty contractor identified
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$2K West of Twin Peaks single-family renovation
Active 10 months ago · Hydro Flow Systems: specialty contractor
Revision to bpa: repair in kind interior stairs less than 50% repair
GC named · 4 specialty contractors identified
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1 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.
4 project records for Hydro Flow Systems Inc: addresses, values, project teams
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Typical project$2K–$80K$35K typical2.1× the SF median ($17K)Last filed170 days agoPresidio Heights · Mar 31, 2026Last 90 days0 active0 newly filed
Filing activity · 16 weeks to Aug 23, 2026
MAY
JUN
JUL
AUG
Project mix · by use
Residential100%
Geography · by neighborhood
Inner Richmond25%
Presidio Heights25%
Sunset/Parkside25%
West of Twin Peaks25%
Shared-project connections
| # | Firm | Primary role | Shared | Relative |
|---|---|---|---|---|
| 1 | Jeffrey A. Eade Architect | Architecture | 1 | |
| 2 | Semco | Engineering | 1 | |
| 1 | Control Fire Inc. | General contractor | 1 | |
| 2 | Ideal Builders | General contractor | 1 | |
| 3 | John Woo Constructionllc | General contractor | 1 | |
| 4 | Wells Electrical, Inc | General contractor | 1 | |
| 5 | Green Air Mechanical Inc | 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 relationships0 firmsFirms this one appears with on more than one project, out of 9 in total.
Permit speed—Too few filings with a recorded issue date to publish a median.
Frequently asked questions
How many SF projects does Hydro Flow Systems Inc appear on?▾
PermitPipeline tracks 4 San Francisco building-permit projects for Hydro Flow Systems Inc (Oct 2025 to Mar 2026). 0 had filing activity in the last 90 days.
Does Hydro Flow Systems Inc work on commercial or residential projects?▾
Across its tracked San Francisco filings, 0% of Hydro Flow Systems Inc'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 Hydro Flow Systems Inc work?▾
25% of Hydro Flow Systems Inc's tracked San Francisco projects are in Inner Richmond.
What is a typical Hydro Flow Systems Inc project worth?▾
The median declared value across the 4 San Francisco projects Hydro Flow Systems Inc has on record that state one is $35K (declared value on the permit filing, not contract value).
Which firms appear most often on the same filings as Hydro Flow Systems Inc?▾
Hydro Flow Systems Inc most frequently appears on the same San Francisco permit filings as Control Fire Inc., Ideal Builders, Jeffrey A. Eade Architect. Appearing together indicates association on shared filings, not a proven working relationship.
Is Hydro Flow Systems Inc a plumbing contractor?▾
Hydro Flow Systems Inc 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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