Free SF apartment background check

423-425 35Th Ave

Outer Richmond, SF 94121 1467005 2 units · 2 fl · 2005

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 Outer Richmond
At or below average
avg 0.7
0
FewerMore

This building has 0 novs (7y), at or below the Outer Richmond average of 0.7.

Rent & eviction protection

Is 423-425 35Th 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 2005
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH2
Not rent-controlled. Buildings constructed after 1978 are generally exempt from SF rent increase limits under the Costa-Hawkins Act.

Based on SF Assessor records. Not legal advice — confirm with the SF Rent Board.

Building characteristics
Units2
Floors2
Year built2005
Total area3,039 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot1467005
Ownership

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

Owner name
Ma Thomas Wing & Jane Tam
Mailing address
425 35th Ave San Francisco CA 94121
Last sale
081617

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.

425 35th Ave, San Francisco, CA 94121
423 35th Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The property at 423-425 35th Avenue in San Francisco's Outer Richmond neighborhood is a two-unit, three-story residential building constructed in 2005, currently owned by Ma Thomas Wing & Jane Tam. The building has undergone several significant modifications and faced multiple regulatory challenges throughout its history. Most recently, in 2022, a re-roofing project was completed at a cost of $12,700. Between 2016-2017, the ground floor underwent legitimate modifications including the addition of a laundry room, storage area, and half bathroom, costing $24,000 and completed with proper permits. In 2010-2011, the property faced substantial compliance issues when unauthorized modifications were discovered, including illegally added rooms and a full bathroom on the ground floor, which prompted multiple violations and inspections. These unauthorized modifications were ultimately addressed in 2011 when all non-structural interior walls except for the light well were removed, following enforcement of a Board of Appeals decision.

The building's history includes several significant events that required regulatory attention, including the installation of an illegal wooden deck in 2005 (later addressed), and multiple complaints regarding water damage, mold, and unauthorized construction in 2010. The property has undergone several permit modifications and renewals, including a successful 2013 installation of EV charging infrastructure in the garage. Recent maintenance issues have been documented through 311 calls, primarily related to street cleaning and parking concerns, with the most recent service requests from 2024 focusing on structural maintenance and garbage disposal. The building's planning records show various attempts to address and legalize modifications, including a variance request for as-built construction in the rear yard, though some attempts were withdrawn or closed without approval.

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

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Risk rating

How 423-425 35Th 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
100th percentile

Out of 1040 buildings in this neighborhood, 0 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
96%
No DBI
violation
4%
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.

Building permits, owner's portfolio

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

12-Month severity forecast
No violation 90.7%
Moderate concern 6.4%
Severe concern 2.9%
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

423-425 35Th Ave event timeline

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

2022
Building Permit Aug 10
Re-roofing: remove and replace roofing material / existing roofing material (in-kind)
$12,700 · Issued

See all 1 events

Full history back to 2022 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 423-425 35Th 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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