O'sullivan Engineering
Engineering firm · San Francisco permit activity
66 Terradillo Ave, San Rafael, CA 94901
Engineering firm active in San Francisco construction, tracked from public building-permit filings.
#138
by SF filing activity
among SF architects & engineers, last 90 days
5
projects tracked
Jun 2026 to Jul 2026
5/16
active weeks
weeks with a filing (last 16)
3 of the 5 O'sullivan Engineering projects filed new permits in the last 30 days.
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$277K Sunset/Parkside renovation
Filed 21 days ago · O'sullivan Engineering: engineer
2 story horizontal addition to the rear of the house, partial interior remodel, including a kitchen remodel and powder room, and removal of…
No GC named · Architect identified
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$200K Sunset/Parkside renovation
Filed 27 days ago · O'sullivan Engineering: engineer
Converting portion of the garage into living area. adding a bathroom, concrete patio in the rear yard, and adding a small elevator. all…
GC named · 1 other firm identified
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$45K Sunset/Parkside renovation
Filed 8 days ago · O'sullivan Engineering: engineer
Remodeling the upstairs kitchen. raising the ceiling height of the kitchen within the building envelope on the 2nd floor. adding…
No GC named
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2 more
O'sullivan Engineering projects with project intelligence
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 and contact details and full filing histories are part of the paid product.
5 project records for O'sullivan Engineering: addresses, values, project teams
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Middle 50% of declared values: $60K–$247K (median $200K)
Most recent filing: Sunset/Parkside · Jul 28, 2026
5 active · 5 newly observed last 90 days
Filing activity · last 16 weeks
APR
MAY
JUN
JUL
5
active projects (last 90d)
5
newly observed (last 90d)
Jul 2026
peak month
Project mix · by use
Residential100%
Geography · by neighborhood
Sunset/Parkside80%
West of Twin Peaks20%
Shared-project connections
| # | Firm | Primary role | Shared | Relative |
|---|---|---|---|---|
| 1 | Openscope Studio | Architecture | 1 | |
| 2 | Steven Whitney, Architect | Architecture | 1 | |
| 1 | Foxtail Hill Windows & Doors Inc | General contractor | 1 |
Firms that appear on the same San Francisco permit filings. Association on shared filings, not a proven working relationship.
Frequently asked questions
How many SF projects has O'sullivan Engineering filed?▾
PermitPipeline tracks 5 San Francisco building-permit projects for O'sullivan Engineering (Jun 2026 to Jul 2026). 5 had filing activity in the last 90 days.
Does O'sullivan Engineering work on commercial or residential projects?▾
Across its tracked San Francisco filings, 0% of O'sullivan Engineering'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 O'sullivan Engineering work?▾
80% of O'sullivan Engineering's tracked San Francisco projects are in Sunset/Parkside.
What is a typical O'sullivan Engineering project worth?▾
Across the 5 tracked projects with a declared value, O'sullivan Engineering averages $166K per project (declared value on the permit filing, not contract value).
Which firms does O'sullivan Engineering work with most often?▾
O'sullivan Engineering most frequently appears on the same San Francisco permit filings as Steven Whitney, Architect, Openscope Studio, Foxtail Hill Windows & Doors Inc. Appearing together indicates association on shared filings, not a proven working relationship.
Is O'sullivan Engineering an engineering firm?▾
O'sullivan 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 DOB filings.
Public aggregate — full project records are part of the paid leads product. Updated daily from SF DBI filings.
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