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General ConstructionExcelsiorPermit issued

Home Addition and Remodel at 318 Madrid St, Excelsior

318 Madrid St, Excelsior, 94112

Winston

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Reported project cost

$350,000

As declared on the permit filing. Additions & Alterations · 1 Family Dwelling.

Issued
May 4, 2026
Expires
—
License
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What was permitted

Residents in the Excelsior neighborhood can review a significant addition and alteration project at 318 Madrid Street, a single-family home. This extensive remodel includes a rear addition, removal of existing structures, and the addition of new living spaces like a laundry room and kitchen on the second floor.

The permit was issued on May 4, 2026, with a substantial estimated project cost of $350,000. Benjamin Builder is the contractor for this project, which also incorporates seismic upgrades and modifications for fire department ladder access.

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View the official permit record

Tracking number, work description, cost and dates

Tracking number202512222420
Work permit #—
Job filing number—
Work typeAdditions & Alterations · 1 Family Dwelling
Statusissued
Job descriptionrear ext: remove (e)stair & siding, (n)sheathing & siding. 1/f: remove (e)kitchen, (e)inter window at (e) bath, (e)ext door at (e)family rm, (n)wider interior door to acccom eero alter 1-fire dept gr ladder access. legalize (e)bath (e)bedrm. (n)inter stair. 2/f: (n)laundry, (n)kitchen. seismic upgr
Floor / unit—
Estimated cost$350,000
ApprovedApril 28, 2026
IssuedMay 4, 2026
Expires—
BBL—
BIN—

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home additionalterations1 family dwellingExcelsiorSan Franciscoseismic upgrade$250k+