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1230 20Th Ave

Central Sunset, SF 94122 1731039 4 units · 2 fl · 1974

This building has more problems than most buildings in this neighborhood. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Central Sunset
Above average
avg 0.7
1
FewerMore

This building has 1 novs (7y), above the Central Sunset average of 0.7.

Rent & eviction protection

Is 1230 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 1974
2 or more units
4 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
Units4
Floors2
Year built1974
Total area4,150 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1731039
Ownership

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

Owner name
Cheuk Edwin W Revocable Tr
Mailing address
Edwin W Cheuk Trustee 1227 20Th Ave Apt 3 San Francisco CA 94122
Last sale
062501

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 4-unit apartment building at 1230 20th Avenue in the Central Sunset neighborhood has experienced several notable incidents since its construction in 1974, with the most significant issues revolving around fire safety and maintenance concerns. The property has faced recurring fire safety violations, including combustible storage in the garage area (most recently cited in 2014), egress obstruction in common hallways, and the need for proper fire extinguishers, though all these violations were eventually abated. Maintenance issues have also been a concern, with documented problems including a leaking refrigerator (2016), inadequate heating (2013), ventilation issues in Unit #3 (2011), and mold/mildew presence in multiple areas (2011). The building's systems have required various repairs and updates over the years, including a routine carbon monoxide and smoke alarm check in 2014.

Additional historical issues date back to 1998 when there was a malfunction with an electric stove that resulted in safety concerns. More recent external factors affecting the property include various neighborhood maintenance issues as recorded through 311 calls, such as graffiti (2020), sewage backup (2018), and incidents of human waste on the street (most recently in 2024). While the building has experienced multiple violations and maintenance issues over the years, it's important to note that all documented violations have been marked as "Not Active" after being addressed, according to the available records. The most recent building-related service request patterns suggest ongoing maintenance of basic infrastructure and external areas rather than building-specific violations or complaints.

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

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Risk rating

How 1230 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
29th percentile

Out of 814 buildings in this neighborhood, 578 are predicted to be safer.

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

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

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 42.5%
Moderate concern 15.2%
Severe concern 42.3%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

1230 20Th Ave event timeline

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

No dated public records on file yet.
Every record we have

Full data for 1230 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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