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221-223 21St Ave

Central Richmond, SF 94121 1412002A 3 units · 2 fl · 1916

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 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 221-223 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 1916
2 or more units
3 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
Units3
Floors2
Year built1916
Total area3,866 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot1412002A
Ownership

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

Owner name
Huang Ling & Qingming
Mailing address
221 21st Ave San Francisco CA 94121
Last sale
070113

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.

221 21st Ave, San Francisco, CA 94121
223 21st Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The property at 221-223 21st Avenue is a 2-story, 3-unit multi-family residential building located in San Francisco's Central Richmond neighborhood. Built in 1916 and currently owned by Huang Ling & Qingming, this flats and duplex structure has undergone several significant renovations and faced various challenges throughout its history. One of the most critical events was a fire in 2004 that caused substantial damage, requiring comprehensive repairs to the roof, including framing replacement, electrical rewiring of 40% of the top floor, and restoration of interior features, with total reconstruction costs exceeding $55,000. The building's most recent major upgrade occurred in 2012-2013, involving a $55,000 renovation of Unit #1, including kitchen and bathroom remodeling, electrical system upgrades, window replacements, and installation of modern amenities.

The property has experienced two routine housing inspections, one in 2002 and another in 2014, which revealed several safety concerns that were subsequently addressed. The 2002 inspection identified violations related to security devices, handrails, stairs, plumbing and electrical systems, and smoke detection, while the 2014 inspection noted issues with carbon monoxide detectors, fire extinguishers, handrails, and stair openings - all of which were resolved by November 2014. Recent records from 2024 indicate ongoing parking enforcement issues, with multiple citations issued for blocking driveways, suggesting potential access challenges for residents. The building also has a history of garbage and debris concerns along the street frontage, with several reports in recent months (August-October 2024) regarding abandoned items and loose garbage, though these issues have typically been resolved promptly by city services.

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

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Risk rating

How 221-223 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
26th percentile

Out of 2250 buildings in this neighborhood, 1665 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
76%
No DBI
violation
24%
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.

Building size

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

Estimated permit spend (past 7 years)

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

Construction spend, owner's portfolio

Estimated permit value across all of this owner's buildings.

12-Month severity forecast
No violation 61.8%
Moderate concern 22.7%
Severe concern 15.5%
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

221-223 21St Ave event timeline

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

2024
311 Request Oct 05
Blocking driveway cite only
Parking Enforcement
311 RequestAug 28
Garbage and debris

See all 2 events

Full history back to 2024 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 221-223 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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