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General ConstructionWest of Twin PeaksPermit issued

ADU Construction at 143 Chilton Av, West of Twin Peaks

143 Chilton Av, West of Twin Peaks, 94131

Winston

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Reported project cost

$111,587

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

Issued
October 14, 2026
Expires
—
License
—

What was permitted

Homeowners in the West of Twin Peaks neighborhood can see the costs associated with adding a detached Accessory Dwelling Unit (ADU) to their property. This project included a 252 sqft ADU, 70 sqft attic space, a 39 sqft garage storage closet, and a 92 sqft rear deck, along with the removal of an existing playhouse and pergola.

This significant addition and alteration project was issued on October 14, 2026, with an estimated project cost of $111,587. The work was performed by Pristine Construction.

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View the official permit record

Tracking number, work description, cost and dates

Tracking number202508143060
Work permit #—
Job filing number—
Work typeAdditions & Alterations · 1 Family Dwelling
Statusissued
Job descriptiondetached new construction 252 sqft local adu with 70 sqft attic and 39 s.f. garage storage closet and 92 sqft deck in the rear yard of the main house. remove existing playhouse and pergola/patio. seperate permit for new pool.
Floor / unit—
Estimated cost$111,587
ApprovedOctober 14, 2026
IssuedOctober 14, 2026
Expires—
BBL—
BIN—

Related searches

ADU constructionWest of Twin PeaksSan FranciscoAdditions & Alterations$100k+ projectAccessory Dwelling Unit