Free SF apartment background check

51-53 Beaumont Ave

Lone Mountain, SF 94118 1085006 2 units · 1 fl · 1900

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 Lone Mountain
Above average
avg 0.9
2
FewerMore

This building has 2 novs (7y), above the Lone Mountain average of 0.9.

Rent & eviction protection

Is 51-53 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
2 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.

Building characteristics
Units2
Floors1
Year built1900
Total area1,160 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1085006
Ownership

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

Owner name
Kwan Diane
Mailing address
5005 Cochrane Ave Oakland CA 94618
Last sale
000000

Landlord portfolio

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

Unlock complete report
Multiple entrances & addresses

Included addresses

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

51 A Beaumont Ave, San Francisco, CA 94118
53 A Beaumont Ave, San Francisco, CA 94118
51 Beaumont Ave, San Francisco, CA 94118
53 Beaumont Ave, San Francisco, CA 94118
Augrented Insights
Initial analysis

The property at 51-53 Beaumont Avenue is a 1-story, two-unit multi-family residential building constructed in 1900, currently owned by Diane Kwan. The building has a documented history of unauthorized modifications and subsequent compliance efforts, with the most recent significant activity occurring in December 2023 when permits were filed to legalize a rear horizontal expansion and existing first-floor unit, along with fire sprinkler installation throughout the structure. Earlier in 2023, the building received multiple violation notices for unpermitted construction, including the installation of a bathroom and kitchen on the ground floor and unauthorized renovations to second-floor kitchen and bathroom facilities. These violations followed previous concerns in 2020 involving unauthorized partitioning and electrical work, suggesting a pattern of construction activity exceeding permitted scope.

The building's recent history has been marked by multiple enforcement actions, with the most serious current violation remaining active as of June 2023, regarding unauthorized construction work. Planning records indicate an effort to legalize rear ground floor additions and unauthorized dwelling units, including a state ADU, under California's accessory dwelling unit provisions. The property has experienced several infrastructure and maintenance issues over the years, including underpinning work in 2000 and various complaint responses between 2010 and 2022 regarding potential abandonment, garage usage concerns, and unauthorized modifications. Recent noise-related complaints were filed in 2024. A notable pattern of construction without proper permits is evident, with multiple corrective actions being taken, as shown by the sequence of permits filed between 2020 and 2023, including kitchen and bathroom remodeling, electrical upgrades, and attempts to address various violations through proper legalization processes.

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

Free account unlocks the full analysis — plus 2× more records across all data categories and the complete landlord portfolio.
Risk rating

How 51-53 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
39th percentile

Out of 519 buildings in this neighborhood, 317 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
81%
No DBI
violation
19%
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.

DBI complaint rate, owner's portfolio

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

Building age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

12-Month severity forecast
No violation 42.5%
Moderate concern 43.7%
Severe concern 13.7%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

51-53 Beaumont Ave apartment reviews

Real experiences from people who have lived here. Share yours to help other renters decide.

Share your experience — Help other renters by leaving an honest apartment review

Loading reviews…

On the map

Compare nearby alternatives

This building and nearby alternatives, color-coded by risk level. Click any marker to explore.

Buildings nearby
Loading…
The story over time

51-53 Beaumont Ave event timeline

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

2026
Plumbing Permit Jun 05
Work category: 1p; sewer and house trap
Complete
Planning RecordApr 01
Revision to 202312273127. Update as-built layout to reflect existing conditions. Relocate two front entry doors for the proposed ground floor units. Size of the ground floor units and layout (Legalization and ADU) will be the same.

See all 22 events

Full history back to 2020 — violations, complaints, permits, buyouts, and fire incidents.

Unlock complete timeline
Every record we have

Full data for 51-53 Beaumont Ave apartments

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

Still apartment hunting in SF?

Look up the next apartment before you sign

Search any SF address free — no account needed to see the risk rating.

Simple pricing

Get the complete picture

Every plan unlocks the complete report: all 13 SF datasets, full history, landlord portfolio, and PDF & Excel exports.

Report Bundle

For the buildings you're deciding on right now

$10 one-time

~$3.33 per building. No subscription ever. Each credit unlocks one building's premium report for 30 days.

  • 3 full AI-powered reports
  • Download PDF reports
  • Advanced safety analysis
  • Compare multiple buildings
  • Credits never expire until you use them
  • Full public records (200 rows per dataset)
Buy 3 Reports — $10

Apartment Hunter

For a wide search across many buildings

$39 one-time

30 reports — ~$1.30 each. No subscription ever.

  • 30 full AI-powered reports
  • Download PDF reports
  • Advanced safety analysis
  • Compare multiple buildings
  • Credits never expire until you use them
  • Full public records (200 rows per dataset)
Buy 30 Reports — $39

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

Watch 51-53 Beaumont Ave
Get alerted the moment a new violation or complaint is filed.