Free SF apartment background check

225 21St Ave

Central Richmond, SF 94121 1412003 4 units · 3 fl · 1987

This building has a higher-than-average number of open problems nearby. 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 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 225 21St 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 1987
2 or more units
4 units
Property type
Multi-Family Residential
Zoning
RM1
Not rent-controlled. Buildings constructed after 1978 are generally exempt from SF rent increase limits under the Costa-Hawkins Act.

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

Building characteristics
Units4
Floors3
Year built1987
Total area5,390 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot1412003
Ownership

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

Owner name
Shen Stanley C & Kayama Yur
Mailing address
Berlin Shen 225 21St Ave Apt 1 San Francisco CA 94121
Last sale
063015

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 225 21st Avenue property is a three-story, four-unit multi-family residential building located in the Central Richmond neighborhood, owned by Stanley C Shen and Kayama Yur, and constructed in 1987. The building has undergone several significant modifications and maintenance activities since its construction, including a $24,000 reroofing project completed in 2022 and a substantial ground floor renovation in 2014 that involved converting the space from U to R2 use with the addition of new living spaces and bathrooms, along with the conversion of parking spaces to bike parking. The property experienced a series of building violations in 2004 related to fire safety and alarm systems, all of which were promptly abated by October 2004. Two fire alarm complaints were recorded in 2005 and 2011, both of which were resolved with conditions corrected. The building underwent a sewer repair in 2010 and has been subject to regular housing inspections in 1999, 2010, and 2014, with no ongoing violations noted.

Recent history shows the property has had numerous parking enforcement issues in 2024, with multiple citations issued for illegal parking and sidewalk blocking, though these are external matters not directly related to the building's condition. Additionally, there have been several street cleaning and general maintenance calls to the property address between 2020-2024, all of which have been resolved. The building's permit history indicates proper documentation of major modifications, including the installation of a sprinkler system in 1986 prior to construction, though an earlier sprinkler system permit from 1986 was cancelled. The property's records show a generally responsive management approach to maintenance and violations, with all recorded issues being addressed and resolved in a timely manner.

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

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Risk rating

How 225 21St 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
72th percentile

Out of 2250 buildings in this neighborhood, 630 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
88%
No DBI
violation
12%
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.

Building size

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

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 80.8%
Moderate concern 12.3%
Severe concern 6.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

225 21St Ave apartment reviews

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On the map

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The story over time

225 21St Ave event timeline

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

2024
311 Request Sep 04
Garbage and debris
electronics

See all 3 events

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

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Every record we have

Full data for 225 21St 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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