Free SF apartment background check

359 20Th Ave

Central Richmond, SF 94121 1452047 15 units · 3 fl · 1964

This building has far more open problems than almost any other in the neighborhood. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Central Richmond
At or below average
avg 0.5
0
FewerMore

This building has 0 novs (7y), at or below the Central Richmond average of 0.5.

Rent & eviction protection

Is 359 20Th Ave 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 1964
2 or more units
15 units
Property type
Multi-Family Residential
Zoning
RM1
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.

Building characteristics
Units15
Floors3
Year built1964
Total area12,471 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1452047
Ownership

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

Owner name
Yut Gay Wong Survivor'S Tr
Mailing address
Ellen Yee 10554 Meteor Pl Cupertino CA 95014
Last sale
000000

Landlord portfolio

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

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Augrented Insights
Initial analysis

Located in San Francisco's Central Richmond neighborhood, 359 20th Avenue is a 15-unit, three-story apartment building constructed in 1964 and currently owned by the Yut Gay Wong Survivor's Trust. The building has undergone several significant safety and infrastructure improvements over the past decade, including a mandatory soft-story seismic retrofit completed in 2015 (classified as Tier 2 completed with CFC issued), fire alarm system upgrades in 2023 to meet current code requirements, and an emergency fire alarm panel replacement in 2015. The building has experienced recurring issues with its fire alarm system, evident from multiple fire complaints regarding alarm systems between 2009 and 2019, though all were marked as "Condition Corrected." A notable cluster of violations was documented in 2017, including problems with mold/mildew, heat supply, and interior surfaces, though these were all abated by November 2018.

The property has seen various maintenance and improvement projects, including reroofing (2011), window replacements (2002), and addressing various interior issues such as electrical problems and plumbing concerns. Several resident complaints from 2011-2017 indicate issues with maintenance and building systems, particularly during and after the 2015 seismic retrofit work, which reportedly resulted in wall cracks and water damage. The building's compliance history shows regular attention to safety systems, with documented fire extinguisher and alarm system maintenance, though the frequency of these issues suggests ongoing challenges with building systems. Recent building permits demonstrate continued investment in building infrastructure, including the most recent fire alarm system upgrade completed in 2023 at a cost of over $45,000. The property has maintained its residential classification and continues to operate as a multi-family dwelling under the current ownership.

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

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Risk rating

How 359 20Th Ave'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
5th percentile

Out of 2250 buildings in this neighborhood, 2138 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
38%
No DBI
violation
62%
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.

Owner's portfolio size

Number of SF parcels this owner is registered on — larger portfolios have distinct risk patterns.

12-Month severity forecast
No violation 34.4%
Moderate concern 48.4%
Severe concern 17.2%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

359 20Th Ave apartment reviews

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The story over time

359 20Th Ave event timeline

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

2026
Fire Complaint Jan 21
Sleeping Area Requirement
Violation Issued

See all 4 events

Full history back to 2023 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 359 20Th Ave 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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