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1506-1508 Underwood Ave

Bayview, SF 94124 5361004 2 units · 2 fl · 1907

This building has more problems than most buildings in this neighborhood. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Bayview
At or below average
avg 4.5
1
FewerMore

This building has 1 novs (7y), at or below the Bayview average of 4.5.

Rent & eviction protection

Is 1506-1508 Underwood 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 1907
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH1
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 built1907
Total area2,000 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot5361004
Ownership

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

Owner name
Yin Kwan Tam Fmly Tr
Mailing address
Tam Yin Kwan Ttee 150 Urbano Dr San Francisco CA 94127
Last sale
031021

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.

1506 Underwood Ave, San Francisco, CA 94124
1508 Underwood Ave, San Francisco, CA 94124
Augrented Insights
Initial analysis

The property at 1506-1508 Underwood Avenue is a two-unit, two-story multi-family residential building constructed in 1907, currently owned by the Yin Kwan Tam Family Trust. The building has undergone significant renovations between 2020-2021, including substantial interior remodeling and system upgrades, with work totaling approximately $420,000. This renovation included adding new bathrooms and closets, relocating bedrooms, and creating a master suite in the attic, along with electrical rewiring and new furnaces installation. The exterior received attention as well, with staircase redesigns and siding repairs completed in compliance with previous violations from 2015.

The property has a documented history of maintenance issues and violations, particularly prior to the recent renovations. Numerous complaints about blight, including peeling paint, broken windows, and pest infestations, were filed between 2015-2019, leading to multiple Notices of Violation. The building had active violations as of late 2015 related to various building, plumbing, and sanitation issues, including problems with stairs, windows, bathroom facilities, and lead paint hazards. Several fire safety concerns were also recorded between 2006-2018, primarily related to combustible materials and vegetation near the structure. The recent renovation period (2020-2021) appears to have addressed many of the building's prior deficiencies, though there are some ongoing concerns noted in recent 311 calls regarding garbage and debris on the property as of early 2025.

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

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Risk rating

How 1506-1508 Underwood 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
29th percentile

Out of 382 buildings in this neighborhood, 271 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
44%
No DBI
violation
56%
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 complaint rate, owner's portfolio

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

Construction spend, owner's portfolio

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

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 30.6%
Moderate concern 34.3%
Severe concern 35.1%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

1506-1508 Underwood Ave event timeline

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

2021
Building Permit Aug 17
Rev to pa202009265169: redesign front exterior staircase leading from 2/f to g/f.
$1 · Complete
Electrical PermitJul 13
New wire all house

See all 13 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1506-1508 Underwood Ave apartments

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

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