4323 20TH ST
Castro/Upper Market · San Francisco, CA · Parcel 2751028 · Last violation Mar 4, 2026 · Last complaint Nov 6, 2025
NeighborhoodCastro/Upper Market
More violations than 96% of nearby buildings
More violations than 96% of buildings and more complaints than 98% of buildings in Castro/Upper Market.
Size-normalized against residential buildings in the neighborhood.
Activity TrendsLast 5 years
More activity recently than in past years
Last 2 yrs: 16 violations · 13 complaints
Severityⓘopen violations
All DBI violations have been resolved
Notices of Violation issued by the Department of Building Inspection, by current status.
Severe0
Serious0
Minor0
311 Housing Complaints
Total complaints since 2025
13
7 per year avg.↑ Rising — no prior history
Complaint severity
Last 5 years
13
Severeⓘ2
Seriousⓘ9
Minorⓘ2
Dept. of Building Inspection Violations
Total violations since 2000
45
2 per year avg.↑ Up 167% in the last 2 years (16 vs 6 prior 2 yrs)
Open violations
0
No open DBI violations on record.
building section26 violations
other section6 violations
fire section5 violations
interior surfaces section3 violations
smoke detection section3 violations
plumbing and electrical section1 violations
sanitation section1 violations