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General ConstructionDowntownPermit issued

Accessory Dwelling Unit (ADU) Construction at 449 N 12th St, Downtown

449 N 12TH ST 2, Downtown, 95112

Winston

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Reported project cost

$175,920

As declared on the permit filing. New Construction · ADU Accessory Dwelling Unit.

Issued
September 22, 2026
Expires
—
License
—

What was permitted

Homeowners in Downtown San Jose looking to add an Accessory Dwelling Unit (ADU) can find valuable cost information from this permit. This project involved comprehensive building, electrical, and plumbing work for a detached ADU.

Issued on September 22, 2026, this significant project for a new detached ADU in Downtown San Jose had an estimated cost of $175,920. The permit was issued to BEST BROTHER BUILDER.

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View the official permit record

Tracking number, work description, cost and dates

Tracking number2025-131700-RS
Work permit #—
Job filing number—
Work typeNew Construction · ADU Accessory Dwelling Unit
StatusIssued
Job descriptionBuilding, Electrical, Plumbing, Mechanical work: DETACHED ADU
Floor / unit—
Estimated cost$175,920
Approved—
IssuedSeptember 22, 2026
Expires—
BBL—
BIN—

Property owner

Wang Chuan And Jiang Lan

Related searches

ADUAccessory Dwelling Unitnew constructionDowntown San Josebuildingelectricalplumbing$175,920