Double -D Engineering is an engineering firm with 95 tracked San Francisco building-permit projects on record, with the latest filing in that record 27 days ago. Its filings (Jan 2025 to Aug 2026) are concentrated in Noe Valley and West of Twin Peaks, 97% residential. A typical project in the record declares $10K–$180K. If you work at Double -D Engineering, claim this page to add a description.
Filed 27 days ago
#21
by SF filing activity
among SF architects & engineers, 90 days to Aug 23, 2026
95
projects
from 219 filings
14/16
active weeks
weeks with a filing (16 weeks to Aug 23, 2026)
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Permit-backed projects · PermitPipeline’s independent record
$50K Sunset/Parkside renovation
Grade BActive 27 days ago · Double -D Engineering: engineer
To comply with, repair concrete roof at rear of property, waterproof top side of concrete roof
GC named · Engineer identified · Specialty contractor identified · 1 anticipated category not yet filed
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$560K Outer Richmond single-family renovation
Grade AActive 6 days ago · Double -D Engineering: engineer
Alter interior floor plan of g/f & top floor. addition limited to rear of building. no change to bldg height or in unit count. new deck at…
GC named · Architect identified · 2 anticipated categories not yet filed
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$137K Outer Richmond single-family renovation
Grade BActive 4 months ago · Double -D Engineering: engineer
Electrical work for 1st fl. install new subpanel, new kitchen and new bathroom
GC named · Architect identified · Engineer identified · Specialty contractor identified
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92 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.
95 project records for Double -D Engineering: addresses, values, project teams
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Typical project$10K–$180K$35K typical2.1× the SF median ($17K)Last filed27 days agoHayes Valley · Aug 20, 2026Last 90 days17 active7 newly filed
Filing activity · 16 weeks to Aug 23, 2026 · peak May 2026
MAY
JUN
JUL
AUG
Project mix · by use
Commercial3%
Residential97%
Geography · by neighborhood
Noe Valley29%
West of Twin Peaks25%
Pacific Heights18%
Mission16%
Marina12%
Shared-project connections
| # | Firm | Primary role | Shared | Relative |
|---|---|---|---|---|
| 1 | Andre Rothblatt Architecture | Architecture | 4 | |
| 2 | Hood Thomas Architects | Architecture | 4 | |
| 3 | Studio 797 | Architecture | 4 | |
| 4 | Double D Engineeering | Architecture | 3 | |
| 5 | I-Design Arch. | Architecture | 3 | |
| 1 | The Toboni Group | General contractor | 5 | |
| 2 | Pio Mcgarr Inc | General contractor | 4 | |
| 3 | Add A Garage Inc. | General contractor | 3 | |
| 4 | Mulhall Construction Inc. | General contractor | 3 | |
| 5 | Andrew Gallagher Construction | General contractor | 2 |
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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 connectedArchitects are licensed by the California Architects Board and engineers by BPELSG. Neither register is part of the San Francisco permit record, and we do not yet read them.
Repeat working relationships27 firmsFirms this one appears with on more than one project, out of 127 in total.
Permit speed105 days72 days longer than the SF median
based on 16 firm filings vs 4,334 SF filings
based on 16 firm filings vs 4,334 SF filings
Frequently asked questions
How many SF projects does Double -D Engineering appear on?▾
PermitPipeline tracks 95 San Francisco building-permit projects for Double -D Engineering (Jan 2025 to Aug 2026). 17 had filing activity in the last 90 days.
Does Double -D Engineering work on commercial or residential projects?▾
Across its tracked San Francisco filings, 3% of Double -D Engineering's projects are commercial and 97% are residential (multifamily, small residential, or single-family). Based on permit records, not self-reported.
Where in San Francisco does Double -D Engineering work?▾
29% of Double -D Engineering's tracked San Francisco projects are in Noe Valley.
What is a typical Double -D Engineering project worth?▾
The median declared value across the 94 San Francisco projects Double -D Engineering 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 Double -D Engineering?▾
Double -D Engineering most frequently appears on the same San Francisco permit filings as The Toboni Group, Andre Rothblatt Architecture, Hood Thomas Architects. Appearing together indicates association on shared filings, not a proven working relationship.
Is Double -D Engineering an engineering firm?▾
Double -D Engineering 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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