4323 20th Street
Castro (Eureka Valley) · San Francisco, CA 94114
37.7574, −122.4362
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10,229 sq ftBuilding area
4,874 sq ftLot area
44Rooms · 12 baths
Permit history
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May 2026
Reroofing: remove the existing roof and install modified bitumen with 2 layers of base. no hot works.
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Nov 2016
Soft story retrofit per sfbc chapter 34b engineering criteria 2012 iebc appendix a-4. maher na.
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Oct 1998
Replace windows and patio doors back of building.
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Nov 1993
Reroofing.
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Jan 1984
To comply wwith b.b 1 complaint #s21614.
1 nominal $1 street-space permit is omitted.
Not yet documented: the architect and builder and the early residents. Know any of it? Tell us — just describe it in plain words.