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General ConstructionMissionPermit issued

ADU Conversion at 3680A 20th St, San Francisco

3680A 20th St, Mission, 94110

Winston

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Reported project cost

$156,759

As declared on the permit filing. Additions & Alterations · Apartments.

Issued
May 19, 2026
Expires
—
License
—

What was permitted

This permit details the conversion of a ground-floor commercial space into a new Accessory Dwelling Unit (ADU), including a bedroom, bathroom, kitchen, and dining room. This is a common type of project for homeowners looking to add rental income or living space.

The project, located in the Mission neighborhood, was issued on May 19, 2026, with an estimated cost of $156,759. D Construction Inc. was the contractor for this ADU conversion.

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View the official permit record

Tracking number, work description, cost and dates

Tracking number202502240913
Work permit #—
Job filing number—
Work typeAdditions & Alterations · Apartments
Statusissued
Job description1/f: remodel (e) commerical space to new adu per planning code section 207.1 (3680 20th st). new adu include bedroom, bathroom, kitchen, and dining room.
Floor / unit—
Estimated cost$156,759
ApprovedMay 19, 2026
IssuedMay 19, 2026
Expires—
BBL—
BIN—

Related searches

ADU conversionapartmentsSan FranciscoMissioncommercial remodel$150,000+ project cost