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355 21St Ave

Central Richmond, SF 94121 1453011 8 units · 3 fl · 1961

This building has significantly more problems than most nearby buildings. 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 355 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 1961
2 or more units
8 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
Units8
Floors3
Year built1961
Total area5,440 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1453011
Ownership

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

Owner name
Gin Deborah E
Mailing address
1180 Helen Dr Millbrae CA 94030
Last sale
022421

Landlord portfolio

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

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Augrented Insights
Initial analysis

The two-story, six-unit apartment building at 355 21st Avenue in the Central Richmond neighborhood, owned by Deborah E. Gin, has undergone significant improvements and expansion since 2018. Most notably, the building completed a soft-story retrofit in 2016 (Tier 3) and added two new units (Units #7 and #8) between 2018-2019, including fire sprinkler system installation and comprehensive electrical upgrades to accommodate the additional units. Recent improvements include a Unit 1 remodel (2024) with kitchen and bathroom updates, new electrical wiring, and a smoke alarm system upgrade (2020). The building has been proactive in maintaining safety standards, demonstrated by the complete fire alarm system upgrade (2021), though there were several fire-related violations noted in a 2004 inspection, all of which were abated by June 2004. Regular maintenance continues, as evidenced by recent plumbing work (2024) and the replacement of damaged siding (2020). The property has generally maintained compliance with housing standards, with only routine inspections occurring since the 2004 violations were addressed. Recent 311 calls have primarily concerned street-level issues not directly related to the building itself, such as general cleaning and abandoned vehicles. The most recent significant building improvement was a comprehensive kitchen and bathroom remodel in Unit 1 completed in 2024, demonstrating ongoing maintenance of the property's units and systems.

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

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Risk rating

How 355 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
17th percentile

Out of 2250 buildings in this neighborhood, 1868 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
70%
No DBI
violation
30%
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.

Building size

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

12-Month severity forecast
No violation 45.7%
Moderate concern 40.0%
Severe concern 14.3%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

355 21St Ave apartment reviews

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The story over time

355 21St Ave event timeline

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

2024
Plumbing Permit Jun 17
Work category: 2pa; #1 remodel 1 bathroom and kitchen install 1 shower pan
Complete
Electrical PermitJun 12
To install complete new electrical; wiring , 29 lights, one exhaust fan, 30 receptacles,three smoke detectors ,new wiring for bathroom, kitchen two bedrooms one living room , stove line 50 amps, reconnect existing electric heaters to the new sub panel ,all this new wiring will be connected to the new sub panel

See all 20 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 355 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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