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General ConstructionCastro/Upper MarketPermit issued

Floor Support and Drainage at 4320 18th Street, San Francisco

4320 18th St, Castro/Upper Market, 94114

Winston

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Reported project cost

$13,827

As declared on the permit filing. Alterations · 2 Family Dwelling.

Issued
July 22, 2026
Expires
—
License
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What was permitted

Homeowners in the Castro/Upper Market area can explore the costs involved in voluntary structural improvements, such as stabilizing floor systems with smart jacks and installing a crawl space drainage system. This project aims to enhance the building's integrity and manage water.

This permit for a 2-family dwelling was issued on July 22, 2026, with an estimated project cost of $13,827. Smp Construction & Maintenance Inc. is the listed contractor for this work.

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View the official permit record

Tracking number, work description, cost and dates

Tracking number202607144970
Work permit #—
Job filing number—
Work typeAlterations · 2 Family Dwelling
Statusissued
Job descriptionvoluntary floor support stabilize the floor system above where smart jacks are installed. voluntary crawl space drainage with hydraway drainage and smart sump pump
Floor / unit—
Estimated cost$13,827
ApprovedJuly 22, 2026
IssuedJuly 22, 2026
Expires—
BBL—
BIN—

Related searches

floor supportcrawl space drainagevoluntary improvementCastro/Upper MarketSan Francisco2 family dwelling$13,827