Thor Matteson S.E. is an engineering firm with 3 tracked San Francisco building-permit projects on record, with the latest filing in that record 84 days ago. Its filings (Aug 2025 to Jun 2026) are concentrated in Castro/Upper Market and Glen Park, 100% residential. If you work at Thor Matteson S.E., claim this page to add a description.
Filed 84 days ago
#757
by SF filing activity
among SF architects & engineers, 90 days to Aug 23, 2026
3
projects
from 5 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
$52K Sunset/Parkside single-family renovation
Grade BActive 2 months ago · Thor Matteson S.E.: engineer
Voluntary strengthening at ground floor
GC named · Specialty contractor identified · 1 anticipated category not yet filed
View project details →
$20K Glen Park single-family renovation
Last active Aug 2025 · Thor Matteson S.E.: engineer
Work category: 1p; install new heat pump water heater
No GC named · Specialty contractor identified
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3 project records for Thor Matteson S.E.: addresses, values, project teams
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Declared values3 on filetoo few for a rangeLast filed84 days agoSunset/Parkside · Jun 25, 2026Last 90 days1 active1 newly filed
Filing activity · 16 weeks to Aug 23, 2026 · peak Jun 2026
MAY
JUN
JUL
AUG
Project mix · by use
Residential100%
Geography · by neighborhood
Castro/Upper Market34%
Glen Park33%
Sunset/Parkside33%
Shared-project connections
| # | Firm | Primary role | Shared | Relative |
|---|---|---|---|---|
| None on shared filings. | ||||
| 1 | Seismic Retrofitters Inc. | General contractor | 1 | |
| 2 | Building Efficiency Inc | Electrical 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 licenseCalifornia architect #S4097On 1 of this firm's filings. Architect licenses are held by individuals, not by firms.
Repeat working relationships0 firmsFirms this one appears with on more than one project, out of 2 in total.
Permit speed—Too few filings with a recorded issue date to publish a median.
Frequently asked questions
How many SF projects does Thor Matteson S.E. appear on?▾
PermitPipeline tracks 3 San Francisco building-permit projects for Thor Matteson S.E. (Aug 2025 to Jun 2026). 1 had filing activity in the last 90 days.
Does Thor Matteson S.E. work on commercial or residential projects?▾
Across its tracked San Francisco filings, 0% of Thor Matteson S.E.'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 Thor Matteson S.E. work?▾
34% of Thor Matteson S.E.'s tracked San Francisco projects are in Castro/Upper Market.
Which firms appear most often on the same filings as Thor Matteson S.E.?▾
Thor Matteson S.E. most frequently appears on the same San Francisco permit filings as Seismic Retrofitters Inc., Building Efficiency Inc. Appearing together indicates association on shared filings, not a proven working relationship.
Is Thor Matteson S.E. an engineering firm?▾
Thor Matteson S.E. 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 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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