Free SF apartment background check

281-285 Diamond St

Eureka Valley/Dolores Heights, SF 94114 2697021 3 units · 2 fl · 1969

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 Eureka Valley/Dolores Heights
At or below average
avg 1.3
0
FewerMore

This building has 0 novs (7y), at or below the Eureka Valley/Dolores Heights average of 1.3.

Rent & eviction protection

Is 281-285 Diamond St 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 1969
2 or more units
3 units
Property type
Multi-Family Residential
Zoning
RH3
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 built1969
Total area3,776 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2697021
Ownership

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

Owner name
Chorley-Woo Trust
Mailing address
Lillian Woo, Tte 1976 Lexington Ave San Mateo CA 94402
Last sale
061006

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.

285 Diamond St, San Francisco, CA 94114
281 Diamond St, San Francisco, CA 94114
Augrented Insights
Initial analysis

The property at 281-285 Diamond Street is a two-story, three-unit multi-family residential building constructed in 1969, currently owned by the Chorley-woo Trust. The building has undergone several significant improvements over the past decades, including a complete reroofing project in 2011 costing $14,452, the installation of aluminum windows in 1984, and foundation raising work on the west wall in 1986. More recent maintenance includes the replacement of two aluminum sliding doors with vinyl doors in 2013, a project valued at $2,500. The building has been subject to two routine housing inspections in 2001 and 2011, with the only noted violation being a fire safety issue in 2001 regarding egress obstruction, which was promptly addressed within three weeks of the notice.

Recent activity around the property has primarily involved exterior maintenance and municipal services, with multiple 311 calls between 2020 and 2022 concerning street cleaning, tree maintenance, parking enforcement, and streetlight issues. The most recent concerns in 2022 involved reports of loose garbage and a damaged tree, both of which were resolved by city services. The building's maintenance history shows regular upkeep of major systems and features, with no recent building code violations or serious complaints on record. The property's relatively clean inspection history and consistent maintenance record suggest proper management of the building's physical infrastructure, with most recent external issues being typical urban maintenance concerns rather than building-specific problems.

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

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Risk rating

How 281-285 Diamond St'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
47th percentile

Out of 1278 buildings in this neighborhood, 677 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
72%
No DBI
violation
28%
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.

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

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 68.2%
Moderate concern 21.2%
Severe concern 10.6%
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

281-285 Diamond St event timeline

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

2026
DBI Complaint May 01
Date last observed: 30-apr-26; time last observed: 9:00am; floor: ground; exact location: side bldg; building type: residence/dwelling work beyond scope of permit; work being done in dangerous manner; ; additional information: construction at 281 diamond st has been ongoing for approximately two years. the project was previously cited for work performed without a permit (complaint filed february 2026 by an adjacent tenant). a permit was subsequently filed (202602246382, issued 2/24/2026) covering only siding replacement, drywall restoration, and door jamb repair. despite this limited scope, construction has now expanded to include a staging structure built onto the neighboring property at 4338 20th street without consent. given the extended duration and history of permit violations at this address, i am requesting a site inspection to verify compliance with the current permit scope. photos documenting the encroachment are available upon request.;
Building Inspection Division
Building PermitFeb 24
Replace siding as needed. restore drywall as needed. repair wood rot at door jamb (back door). all work - non street visible.

See all 3 events

Full history back to 2026 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 281-285 Diamond St apartments

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

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