Free SF apartment background check

4220 Judah St

Outer Sunset, SF 94122 1802049 12 units · 3 fl · 1975

This building has far more open problems than almost any other in the neighborhood. Renters here report frequent, slow-to-fix problems. Get repair promises in writing and check the unit before signing.

NOVs (7y) vs. neighborhood
Compared to a typical building in Outer Sunset
Above average
avg 1.8
6
FewerMore

This building has 6 novs (7y), above the Outer Sunset average of 1.8.

Rent & eviction protection

Is 4220 Judah 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 1975
2 or more units
12 units
Property type
Multi-Family Residential
Zoning
RH3
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 1975
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
Units12
Floors3
Year built1975
Total area10,869 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1802049
Ownership

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

Owner name
Mailing address
Tania Cheng Sole Member 1967 18Th Ave San Francisco CA 94116
Last sale
050500

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 12-unit, 3-story apartment building at 4220 Judah Street in San Francisco's Outer Sunset neighborhood was constructed in 1975 and has experienced several significant maintenance and safety events over the past decades. Most recently, from 2021 to 2024, there have been recurring fire safety concerns, with multiple complaints regarding blocked exits, sprinkler systems, electrical systems, and extinguishers, though all were marked as "Condition Corrected." In 2022, the building underwent an electrical upgrade, installing 100-amp subpanels in all units, and received a new roof in 2012 at a cost of $14,600. The building has had several maintenance issues requiring attention, including elevator malfunctions (most notably in 2007 and again in 2008), hot water heater problems in 2017, and various apartment-specific repairs in units 103 and 203 in late 2007.

Historical records show multiple building violations that have been addressed, including concerns about combustible storage, egress obstructions, and security issues in the early 2000s. The property has maintained compliance with building standards, as evidenced by the completion of various permits and the resolution of complaints. Maintenance patterns suggest regular upkeep, with the most recent significant work being the electrical upgrade in 2022. The building's location has experienced typical urban challenges, as documented in recent 311 calls for various neighborhood issues, but these are not directly related to the building's internal conditions.

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

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Risk rating

How 4220 Judah 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

Grade A–B — Low risk

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

Grade C — Moderate risk

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

Grade D–F — High risk

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

Neighborhood percentile
2th percentile

Out of 632 buildings in this neighborhood, 619 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
22%
No DBI
violation
78%
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.

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

Number of units

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

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

12-Month severity forecast
No violation 11.1%
Moderate concern 25.3%
Severe concern 63.6%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

4220 Judah St apartment reviews

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On the map

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The story over time

4220 Judah St event timeline

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

2026
311 Request Jan 14
Garbage and debris
other loose garbage debris yard waste

See all 8 events

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

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Every record we have

Full data for 4220 Judah St apartments

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

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

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