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Housing report

3421 20TH ST

San Francisco 94110

Last updated Sep 23, 2026 from public records

Building report score

1/100 High concern

F

Public records show 4 complaint files with active notices of violation, 7 active complaints, 37 complaint records, 19 permit events in the last 5 years, and repeat themes around plumbing / leaks and electrical.

What public records show

7 Active complaints
4 Active notice files
0 Active Fire violations
19 Recent permits
Year built 1906
Units 6
Property class Apartment 5 to 14 Units

Issue signals

Themes and patterns

Plumbing / leaks 16 cases
Electrical 16 cases
Fire / life safety 11 cases
Heat / boiler 10 cases
Pests / sanitation 9 cases

Active enforcement

Open safety and housing issues

DBI complaint 202660069

Jul 28, 2026 · Active · Code Enforcement Section

Has been going on for years....!!!!!!abandoned building / this has been sitting vacant and in a state of total disrepair and blight for years...permit history shows no progress made in years...!!!what in the world is the problem...!?!?! rat infested... drug infested coming and go

DBI complaint 202296611

Oct 3, 2022 · Active · Code Enforcement Section

Soft story program tier iii

DBI complaint 202291846

Jun 9, 2022 · Active · Building Inspection Division

3421-3431 20th st. 94110 --- this site has been an intermittent source of loud construction noise. in a previous complaint, the contractors were smashing out the wall adjoining our building with sledge hammers. we are in the adjoining building 3415 20th st.and were given no prior

DBI complaint 202288910

Mar 24, 2022 · Active · Building Inspection Division

At address --- customer reports illegal construction at 845 pm. customer reports construction is being used to get other tenants out of the building. customer lives next door. permit is defaced and illegible. (311 sr 15133593)

DBI complaint 202182465

Sep 24, 2021 · Active · Housing Inspection Services

No lock on rear entry door, roaches, mice, broken window in common areas, egress obstruction near garbages

DBI complaint 201901291

Nov 14, 2019 · Active · Code Enforcement Section

3421 20th st --- customer says there is major excavation going on at this location (311 sr 11687685)

DBI complaint 201977811

Aug 16, 2019 · Active · Housing Inspection Services

Entry bell, and general maintenance of the common areas and unit.

Formal notices

Notices of violation

Active formal notice on complaint 202296611

Oct 3, 2022

1 active notice item

Active formal notice on complaint 202182465

Sep 24, 2021

17 active notice items

Active formal notice on complaint 201901291

Nov 14, 2019

1 active notice item

Active formal notice on complaint 201977811

Aug 16, 2019

13 active notice items

Permit history

Recent permit activity

Permit 202608247080

Issued Aug 24, 2026 · issued

to comply nov 201977811 and 202182465- 2- provide repair wood rot, 3- repair hadnrails, 4, provide guard rail. all located at rear

Permit 202608247080

Issued Aug 24, 2026 · issued

to comply nov 201977811 and 202182465- 2- provide repair wood rot, 3- repair hadnrails, 4, provide guard rail. all located at rear

Permit 202602105683

Issued Feb 10, 2026 · issued

recommencement and completion of work approved under 201803295058 and 202009275177

Permit 202409130721

Issued Jul 3, 2025 · issued

replace furnace & water heaters ( no fire rated assembly penetration). 2/f , 3/f & 4/f (total 6 units)

Permit 202409130714

Issued Jul 3, 2025 · issued

as built revision for bpa# 201612306363 and 202002073886: structural plan update framing and foundation.

Fire records

Fire violations and inspections

No unresolved Fire violation was found.

Resident reports

Building-related 311 reports

General Request - BUILDING INSPECTION 18145163

Apr 23, 2024 · Closed

General Request - BUILDING INSPECTION 17653950

Dec 12, 2023 · Closed

General Request - BUILDING INSPECTION 15133593

Mar 23, 2022 · Closed

General Request - BUILDING INSPECTION 15096422

Mar 14, 2022 · Closed

General Request - BUILDING INSPECTION 11687685

Nov 14, 2019 · Closed

Full record index

All record numbers on file

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Complaints (37)
Notices of violation (24)
Permits (17)

This page is a non-official summary built from City and County of San Francisco public records (DBI, Fire, 311, building permits). The interactive version below loads the latest data live. Learn how Housing Report Card works.