Permit GraphShortlistSan Francisco building permits since 2000

Block 6589, lot 002

646 Duncan St

City’s use
Single Family Residential
Built
1941
Stories
1
Units
1
Rooms
2 bedrooms, 2 bathrooms
Building
1,078 sq ft
Lot
1,947 sq ft
Zoning
RH1
Construction type
D

From the assessor's latest secured roll, which can lag recent work. Lot plans, zoning and planning history on the city’s Property Information Map

Permits filed here

3 permits filed for this property since 2000.

CompletedIn progressNever finaledExpired or cancelled
FiledOutcomeAddressContractorWork described on the permitDeclared cost
Oct 2, 2026In progress
filed Oct 2026, not yet issued
646 Duncan Stinterior renovations on 1st floor. horizontal addition & interior renovation on 2nd floor, including new rear deck, vertical addition to include new 3rd floor & decks. ab-112
Details
Permit
202608317478
Status
filed
Filed
Oct 2, 2026
Declared cost
$200,000
Address
646 Duncan St

interior renovations on 1st floor. horizontal addition & interior renovation on 2nd floor, including new rear deck, vertical addition to include new 3rd floor & decks. ab-112

Open the permit page

$200,000
Dec 17, 2025Expired or cancelled
cancelled Jan 2026
646 Duncan Stinterior renovations on 1st floor. horizontal addition & interior renovations on 2nd floor including new rear deck. vertical addition to include new 3rd floor & decks.
Details
Permit
202512171980
Status
cancelled
Filed
Dec 17, 2025
Declared cost
$850,000
Address
646 Duncan St

interior renovations on 1st floor. horizontal addition & interior renovations on 2nd floor including new rear deck. vertical addition to include new 3rd floor & decks.

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$850,000
Oct 20, 2015Completed
final sign-off Feb 2016
646 Duncan StDiego Brothers Inc.adding a bathroom in the garage to a sfd
Details
Permit
201510200194
Status
complete
Filed
Oct 20, 2015
Permit issued
Nov 5, 2015
Final sign-off
Feb 16, 2016
Declared cost
$10,000
Address
646 Duncan St

adding a bathroom in the garage to a sfd

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$10,000

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