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21 Beaumont Ave

Lone Mountain, SF 94118 1085001 3 units · 2 fl · 1900

This building has far more open problems than almost any other in the neighborhood. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Lone Mountain
At or below average
avg 0.9
0
FewerMore

This building has 0 novs (7y), at or below the Lone Mountain average of 0.9.

Rent & eviction protection

Is 21 Beaumont 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 1900
2 or more units
3 units
Property type
Multi-Family Residential
Zoning
NC3
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 built1900
Total area3,116 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1085001
Ownership

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

Owner name
Dick & Jan Yamagami Family
Mailing address
Mr & Mrs Yamagami Trustees 42 Commonwealth Ave San Francisco CA 94118
Last sale
022895

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.

21 Beaumont Ave, San Francisco, CA 94118
3401 Geary Blvd, San Francisco, CA 94118
Augrented Insights
Initial analysis

The two-story multi-family residential building at 21 Beaumont Ave, owned by Dick & Jan Yamagami Family, was constructed in 1900 and contains three residential units with ground-floor commercial space. The property has undergone several significant improvements over the past decades, with the most recent major renovations occurring in 2017 when approximately $64,000 was invested in ground-floor tenant improvements including an ADA ramp and bathroom, along with associated plumbing and electrical work ($65,530 total for these improvements). Prior to this, the building underwent roofing work in 2008 ($7,000), and there are records of earlier roofing permits from 1996.

The building's recent history raises some concerns about property management and public safety. There are multiple active and recent complaints regarding the commercial space, including a current active complaint from October 2022 about an empty store and a planning case related to unauthorized change of use from a mattress store to office space in early 2022. Of particular note is a series of fire alarm incidents, primarily consisting of system malfunctions and false alarms, though one incident in 2022 involved a gas leak (with no reported injuries). The property has also experienced recurring issues with sidewalk cleanliness, as evidenced by multiple 311 calls throughout 2024 regarding garbage, debris, and abandoned furniture. While many of these cases were resolved, their frequency suggests ongoing maintenance challenges. The building's commercial space has shown a pattern of unauthorized use changes, with complaints filed in 2017 and 2022 regarding unauthorized construction work and window transparency violations, though these cases have since been marked as "Not Active" and "Open - Abated" respectively.

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

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Risk rating

How 21 Beaumont 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 519 buildings in this neighborhood, 472 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
49%
No DBI
violation
51%
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.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

Property class: apartment building

Apartment building — this property classification influences expected violation rates.

DBI complaint rate, owner's portfolio

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

12-Month severity forecast
No violation 36.4%
Moderate concern 53.8%
Severe concern 9.8%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

21 Beaumont Ave apartment reviews

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The story over time

21 Beaumont Ave event timeline

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

2026
DBI Complaint Jun 16
Vacant storefront
Code Enforcement Section
Electrical PermitApr 21
Replace 2 electrical outlets, receptacles.

See all 13 events

Full history back to 2022 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 21 Beaumont 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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