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3573 20Th St

Inner Mission, SF 94110 3609045 6 units · 2 fl · 1904

This building has a substantial enforcement record over the last seven years, and our model predicts continuing maintenance failures over the next 12 months. Read the records below before you sign. Ask which issues were resolved, get repair commitments in writing, and inspect the unit yourself.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Inner Mission — not a forecast
Above average
avg 2.7
16
FewerMore

This building has 16 novs (7y), above the Inner Mission average of 2.7.

Rent & eviction protection

Is 3573 20Th St rent-controlled?

San Francisco's Rent Ordinance caps rent increases and provides eviction protection for most residential units built before 1979 with 2+ units. Here's how this building scores.

Built before 1979
Built 1904
2 or more units
6 units
Property type
Multi-Family Residential
Zoning
NC1
Likely rent-controlled. Building age and unit count suggest this property falls under San Francisco's Rent Ordinance.

Based on SF Assessor records. Not legal advice — confirm with the SF Rent Board.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1904
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

Building characteristics
Units6
Floors2
Year built1904
Total area3,852 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3609045
Ownership

Registered owner per SF Assessor-Recorder (secured roll).

Mailing address
Sun Jim & Kam Ngor Lau Lee, 192 2Nd Ave San Francisco CA 94118
Last sale
September 14, 1988

Landlord portfolio

Other SF properties this owner holds, with a risk rating for each.

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Augrented Insights
Initial analysis

This 2-story, 6-unit residential building at 3573 20th Street in the Inner Mission neighborhood, built in 1904 and currently owned by the Sun Jim Lee Bypass Trust, has experienced several significant issues in recent years, particularly related to health and safety concerns. Most notably, there were serious heating system problems in early 2024, with complaints about hazardous copper tubing, and the presence of mice emerging from the heater. The building has accumulated a total of 16 Notices of Violation (NOV) over the past seven years, with the most recent violations from January 2024 including window repair needs and issues around a wall furnace. The property was marked as a nuisance in December 2022, and violations were documented at that time regarding the absence of properly maintained fire extinguishers across floors.

The building has also been the subject of multiple 311 service requests, particularly in June 2026, concerning garbage and debris issues in the vicinity, including reports of human waste. The property's inspection and violation history reveals ongoing maintenance challenges, with 518 service requests logged in the past seven years and three formal complaints to the Department of Building Inspection during the same period. These complaints have been periodically addressed and closed, including a health and safety inspection of common areas completed in July 2023. The building's documented issues suggest a pattern of maintenance and safety concerns, particularly regarding heating systems, fire safety equipment, and general upkeep.

AI-generated · may contain errors · check the source data tables below

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Risk rating

How 3573 20Th St's risk score is calculated

We trained a model on 7 years of SF DBI inspection data — notice of violation filings, complaint history, and owner track records. It estimates the probability that DBI inspectors will issue a Notice of Violation at this address in the next 12 months. Lower % = safer.

What the score means for you

Lower risk — safer than most nearby

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Typical — about average for the neighborhood

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Higher risk — riskier than most nearby

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
11thpercentile

Out of 2380 buildings in this neighborhood, 2118 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.

RiskiestSafest
Predicted 12-month outcome
28%
No DBI
violation
72%
DBI violation
likely
Model explanation

What's driving this score

The three data points that most influenced this building's risk rating — ranked by the weight the model placed on each one.

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

Notices of Violation (past 7 years)

DBI issued Notices of Violation at this address over the last 7 years — a direct record of code enforcement activity.

12-Month risk forecast
High failure risk 72%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

3573 20Th St apartment reviews

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On the map

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The story over time

3573 20Th St event timeline

Violations, complaints, fire incidents, permits, and buyouts — most recent records in order.

2026
311 Request Jul 29
Garbage and debris
other bagged boxed contained garbage
311 RequestJun 24
Garbage and debris

See all 13 events

Full history back to 2022 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 3573 20Th St apartments

13 SF public datasets for this parcel — permits, violations, complaints, fire records, 311 calls, planning records, and buyouts.

Side by side

How 3573 20Th St compares to the neighborhood

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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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