3349–3351 21st Street
Mission · San Francisco, CA 94110
37.7566, −122.4223
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1,992 sq ftBuilding area
2,848 sq ftLot area
8Rooms · 3 bed, 3 bath
Permit history
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Jun 2026
Rear deck replacement, remove existing deck and replace with new deck.
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Nov 2025
At west wall install hardie plank sding overlay, approx 280 sq ft. new siding material, non street visible.
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Jan 2018
Replace 3 non-visable rear windows, vinyl. u-fact 0.32 or better. no size changes.
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Sep 2017
Reroofing.
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Dec 1983
Installation of 03 aluminum windows.
Not yet documented: the architect and builder and the early residents. Know any of it? Tell us — just describe it in plain words.