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471-473 21St Ave

Central Richmond, SF 94121 1523015 4 units · 2 fl · 1916

Nothing on record for this building in the last seven years, and our model puts it at a low risk of maintenance problems over the next 12 months. No public enforcement record to go on. Walk the building, ask the current tenants how repairs get handled, and get any promises in writing.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Central Richmond — not a forecast
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.

The bar and the rating point different ways because they measure different things: the bar counts DBI violations already on file, the rating forecasts the next 12 months.

Rent & eviction protection

Is 471-473 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
4 units
Property type
Multi-Family Residential
Zoning
RH2
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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1916
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

Building characteristics
Units4
Floors2
Year built1916
Total area2,490 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1523015
Ownership

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

Owner name
Mailing address
444 42nd Ave San Francisco CA 94121
Last sale
September 29, 1998

Landlord portfolio

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

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Multiple entrances & addresses

Included addresses

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

471 21st Ave, San Francisco, CA 94121
473 21st Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The 4-unit multi-family residential building at 471-473 21st Avenue in the Central Richmond neighborhood is a 2-story structure built in 1916, currently owned by Trac Renee. The building has undergone several significant maintenance and improvement projects over the years, including a complete sewer and water main replacement in 2010, reroofing work in 2000, and substantial interior renovations in 1999 that involved remodeling kitchens and bathrooms, as well as switching kitchen and storage areas. A notable cluster of fire safety violations was recorded in October 2002, with issues related to combustible storage, smoke detectors, egress obstruction, fire proofing, and fire extinguisher maintenance, though all these violations were abated by January 2003.

More recent history shows regular building maintenance and some urban challenges typical of the area, including multiple parking enforcement calls and reports of debris. The most recent 311 call was in August 2024 regarding abandoned electronics, and there have been several parking-related incidents in the vicinity between 2019 and 2023. An active plumbing complaint remains on record from January 1999 regarding unauthorized electrical and plumbing work, though this is now quite dated given the intervening years and subsequent improvements to the building's systems. The building's maintenance history suggests regular upkeep, with permissible improvements including street space and sidewalk maintenance in 2010.

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

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Risk rating

How 471-473 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

Lower risk — safer than most nearby

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Typical — about average for the neighborhood

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Higher risk — riskier than most nearby

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
29thpercentile

Out of 2250 buildings in this neighborhood, 1598 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.

RiskiestSafest
Predicted 12-month outcome
78%
No DBI
violation
22%
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.

Estimated permit spend (past 7 years)

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

12-Month risk forecast
Low failure risk 22%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

471-473 21St Ave apartment reviews

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On the map

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The story over time

471-473 21St Ave event timeline

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

2023
311 Request Jul 23
Bulky items
Electronics
311 RequestJul 23
Bulky items

See all 5 events

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

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Every record we have

Full data for 471-473 21St Ave apartments

13 SF public datasets for this parcel — permits, violations, complaints, fire records, 311 calls, planning records, and buyouts.

Side by side

How 471-473 21St Ave compares to the neighborhood

This building against comparable properties in Central Richmond. Toggle filters to narrow the peer group.

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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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