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304-306 21St Ave

Central Richmond, SF 94121 1452040B 2 units · 2 fl · 1920

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 304-306 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 1920
2 or more units
2 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
Units2
Floors2
Year built1920
Total area2,186 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot1452040B
Ownership

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

Owner name
Kwan Family Trust
Mailing address
306 21st Ave San Francisco CA 94121
Last sale
000000

Landlord portfolio

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

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Multiple entrances & addresses

Included addresses

All street addresses sharing this blocklot that are covered by this report.

306 21st Ave, San Francisco, CA 94121
304 21st Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The Kwan Family Trust owns this two-unit, two-story multi-family residential building known as 304-306 21st Avenue, located in San Francisco's Central Richmond neighborhood. Built in 1920, this flats and duplex structure has undergone several notable maintenance events over its lifetime, with the most significant being a reroofing project completed in 2005 at a cost of $5,700. Historical records show an earlier reroofing attempt in 1991, though this permit ultimately expired.

The most recent incidents affecting the property occurred in 2024, with two specific cases of public space issues: one involving a sedan parked on the sidewalk in May, which resulted in enforcement action, and another in February relating to café furniture blocking the sidewalk, though this had 4 feet of clearance and involved removable furniture. The building's vicinity has experienced recurring street cleanliness challenges, with multiple documented cases of loose garbage requiring city intervention between 2019 and 2024, including incidents on May 19, 2020, September 8, 2021, and September 8, 2023. There was also one instance of offensive graffiti reported in July 2021, which was subsequently addressed. While the building's basic infrastructure appears maintained through historical records, the surrounding area has experienced periodic cleanliness and public space management issues, as evidenced by the documented 311 calls.

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

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Risk rating

How 304-306 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
70th percentile

Out of 2250 buildings in this neighborhood, 675 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
87%
No DBI
violation
13%
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.

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

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 86.3%
Moderate concern 10.9%
Severe concern 2.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

304-306 21St Ave event timeline

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

2023
311 Request Sep 08
General cleaning
Other Loose Garbage
311 RequestMar 17
Bulky items

See all 2 events

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

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Every record we have

Full data for 304-306 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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