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358 21St Ave

Central Richmond, SF 94121 1452029 4 units · 2 fl · 1923

This building has far more open problems than almost any other in the 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 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 358 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 1923
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 built1923
Total area3,650 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1452029
Ownership

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

Owner name
George Chew & Louise H Mar
Mailing address
Mar George Chew & Louise H 743 Brussels St San Francisco CA 94134
Last sale
000000

Landlord portfolio

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

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Augrented Insights
Initial analysis

The two-story, four-unit multi-family residential building at 358 21st Avenue in the Central Richmond neighborhood was constructed in 1923 and is currently owned by George Chew and Louise H Mar. The building's maintenance and safety history reveals several areas of concern, most notably from a routine inspection in October 2014, which generated multiple active violations related to fire safety and lead paint hazards, including the need for proper fire safety equipment, addressing egress obstructions, and managing lead paint concerns. In September 2019, a complaint was filed citing significant disrepair issues throughout the building, including water leaks, mold, non-functioning intercom systems, and unauthorized unit modifications, though this complaint is now listed as not active.

The building has undergone several permitted modifications over the years, including interior partition work in 1985 and 1994, and a street space permit in 2010. More recent history shows some maintenance activity, with various 311 calls in 2022-2024 primarily relating to street cleaning and scooter-related services, though these are not directly related to building conditions. Two fire-related incidents were recorded, but both were false alarms with no injuries reported. While the building has a history of periodical inspections and compliance issues, many of the older violations from 2000 are no longer active. The property recently experienced construction activity in 2020 that generated noise complaints during shelter-in-place orders.

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

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Risk rating

How 358 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
9th percentile

Out of 2250 buildings in this neighborhood, 2048 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
56%
No DBI
violation
44%
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.

Permit rate, owner's portfolio

Per-building permit rate across the owner's portfolio.

12-Month severity forecast
No violation 53.5%
Moderate concern 37.1%
Severe concern 9.4%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

358 21St Ave event timeline

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

2020
DBI Complaint Jun 17
Construction occurring in the back patio. scaffolding is present. the two men doing construction are using an electric sander that hums non-stop from 10am until 6pm. the noise is unbearable while this shelter in place order has kept me at home. (311 sr#12532843)
Building Inspection Division

See all 3 events

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

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Every record we have

Full data for 358 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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