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507 Holloway Ave

Ingleside, SF 94112 6984048 2 units · 2 fl · 1925

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 Ingleside
At or below average
avg 1.5
0
FewerMore

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

Rent & eviction protection

Is 507 Holloway 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 1925
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
Floors2
Year built1925
Total area3,073 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot6984048
Ownership

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

Owner name
Tam/Fung Family Trust
Mailing address
Tam David,trustee 507 Holloway Ave San Francisco CA 94112
Last sale
060497

Landlord portfolio

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

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Augrented Insights
Initial analysis

The two-unit residential building at 507 Holloway Ave in the Ingleside neighborhood, owned by the Tam/Fung Family Trust, has a history dating back to its 1925 construction as a flats and duplex structure. The property underwent significant modifications in the early 1990s, including a 1993 completed permit for a 1-story vertical addition and rear yard sunroom valued at $123,500, followed by minor framing changes in 1994. However, there remains an active building complaint from October 1994 regarding unauthorized modifications to the backyard area, with concerns about deviations from original plans and permits.

More recent history reveals recurring sewer issues, with multiple sewage backup incidents reported between 2021 and 2024, including three separate incidents in January 2024 alone. These sewer problems have generated several 311 calls, and while each incident was marked as resolved, the frequency suggests an ongoing infrastructure challenge. Additional incidents in 2023-2024 involved minor neighborhood issues such as parking violations and abandoned vehicles, though these are unrelated to building condition concerns. A fire complaint regarding combustible materials was filed in 2005 but was determined to have no merit, and there was one documented water or steam leak incident with no civilian injuries, though the exact date is not specified. The building's documented history combines both significant structural modifications from the 1990s and persistent maintenance challenges in recent years.

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

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Risk rating

How 507 Holloway 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
49th percentile

Out of 156 buildings in this neighborhood, 80 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
70%
No DBI
violation
30%
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.

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

DBI complaint rate, owner's portfolio

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

12-Month severity forecast
No violation 43.3%
Moderate concern 21.7%
Severe concern 35.0%
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

507 Holloway Ave 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 507 Holloway 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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