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635-637 34Th Ave

Outer Richmond, SF 94121 1577005 2 units · 2 fl · 1960

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 635-637 34Th 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 1960
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 built1960
Total area2,926 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1577005
Ownership

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

Owner name
Lin Kee & Kwan Ying Chow Ho
Mailing address
Jwab Ying Chow Hoo Succ Tte 4844 California St San Francisco CA 94118
Last sale
121809

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.

635 34th Ave, San Francisco, CA 94121
637 34th Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The two-unit residential building at 635-637 34th Avenue in San Francisco's Outer Richmond district, owned by Lin Kee & Kwan Ying Chow Ho, has undergone significant modifications since its construction in 1960 as a two-story flats/duplex structure. The most substantial renovation occurred between 2005-2007, when the lower unit (635) underwent a major basement conversion project valued at $20,000, adding two bedrooms, a half bathroom, and a hallway, along with associated electrical work for the new amenities. This permitting process experienced multiple renewals and extensions, suggesting some complexity in reaching final inspection approval. Earlier building modifications include the installation of asbestos siding to the back of the building in 1983.

More recent issues affecting the property include a 2010 complaint about paint scraping without proper containment, though this was resolved promptly. The building has experienced some maintenance challenges in recent years, including a sewage backup incident from the side sewer vent in September 2024 (recently resolved), and an open request for tree pruning due to overgrowth from August 2023. There have been multiple incidents of abandoned vehicles and illegal parking on the property in 2023, though these were generally resolved through standard enforcement procedures. The building also experienced graffiti in January 2023, though this was part of a larger citywide backlog of complaints related to COVID-19 enforcement suspensions. Two driveway blocking incidents were recorded in 2022, with at least one resulting in a citation being issued.

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

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Risk rating

How 635-637 34Th 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
85th percentile

Out of 1040 buildings in this neighborhood, 156 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
90%
No DBI
violation
10%
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 severity forecast
No violation 84.2%
Moderate concern 10.0%
Severe concern 5.8%
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

635-637 34Th 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 635-637 34Th 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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