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2948 Diamond St

Glen Park, SF 94131 6756006 3 units · 2 fl · 1978

Nothing on record for this building in the last seven years. Our model still sees a moderate chance of maintenance problems in the next 12 months, from the owner's wider portfolio and the surrounding area rather than from anything recorded here. 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 Glen Park — not a forecast
At or below average
avg 1.5
0
FewerMore

This building has 0 novs (7y), at or below the Glen Park average of 1.5.

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 2948 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 1978
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.

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 1978
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
Units3
Floors2
Year built1978
Total area3,002 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot6756006
Ownership

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

Mailing address
1555 28th Ave San Francisco CA 94122
Last sale
January 20, 2005

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 3-unit, 2-story multi-family residential building located at 2948 Diamond Street in Glen Park was constructed in 1978 and is currently owned by Fong Clark L & Yee-fong Mai. The building's history reveals several significant safety and maintenance issues, particularly during the early 2000s. In 2004, the property underwent window replacement, with 12 double-pane vinyl windows installed facing the street at a cost of $5,000. A notable cluster of violations was documented in May 2002, including fire safety concerns such as combustible storage in the garage, missing unit identification numbers, and smoke enclosure door issues, all of which were abated by June 2002. Additional violations were recorded in August 2004 regarding interior surfaces, egress obstruction, and concerns about lead-based paint. That same month, a complaint was filed regarding mold and mildew throughout the building, which was later addressed through window replacements that were completed by January 2005.

More recent building inspections were conducted in 2007 and 2009, focusing on common areas, with no active violations noted. The property has experienced several external issues between 2022 and 2024, as evidenced by 311 calls, including reports of graffiti, medical waste, and tree-related concerns. These recent incidents generally relate to the property's surroundings rather than the building structure itself. While the building's earlier history shows multiple safety violations and maintenance challenges, most of these issues were addressed by the mid-2000s, with no significant internal violations recorded in recent years. The most recent significant building-related concern was a 2023 report of flooding/sanitation issues on the street, though this appears to have been a municipal infrastructure matter rather than a building-specific problem.

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

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Risk rating

How 2948 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

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
21stpercentile

Out of 364 buildings in this neighborhood, 288 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
61%
No DBI
violation
39%
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.

Construction spend, owner's portfolio

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

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

12-Month risk forecast
Moderate failure risk 39%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

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On the map

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The story over time

2948 Diamond St event timeline

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

No dated public records on file yet.
Every record we have

Full data for 2948 Diamond St apartments

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

Side by side

How 2948 Diamond St compares to the neighborhood

This building against comparable properties in Glen Park. 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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