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339-341 West Portal Ave

West Portal, SF 94127 3012020A 3 units · 3 fl · 1935

This building has a higher-than-average number of open problems nearby. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in West Portal
At or below average
avg 2.0
1
FewerMore

This building has 1 novs (7y), at or below the West Portal average of 2.0.

Rent & eviction protection

Is 339-341 West Portal 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 1935
2 or more units
3 units
Property type
Multi-Family Residential
Zoning
WPORTL
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
Units3
Floors3
Year built1935
Total area5,145 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3012020A
Ownership

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

Owner name
Yang Chi-Kuo & Lee Chen
Mailing address
Po Box 27658 San Francisco CA 94127
Last sale
050500

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.

339 West Portal Ave, San Francisco, CA 94127
341 West Portal Ave, San Francisco, CA 94127
339 A West Portal Ave, San Francisco, CA 94127
Augrented Insights
Initial analysis

The three-story mixed-use building at 339-341 West Portal Avenue, owned by Yang Chi-kuo & Lee Chen, was constructed in 1935 and contains three residential units plus commercial space. The property has experienced several significant events over its history, with the most pressing recent issues occurring between late 2024 and early 2025, including sidewalk defects, lighting problems, and water-related concerns. A noteworthy vacancy issue arose in 2019 when the property received violations for failing to comply with the vacant commercial storefront ordinance, though these violations were abated by September 2019. The building's commercial space has housed various businesses, most recently Mysa Day Spa, which underwent multiple sign installations between 2020-2021, displaying both single- and double-faced wall signs with associated electrical work.

The property has faced maintenance and safety challenges over the years, with complaints in 2012 regarding rotting decks, electrical issues, and a damaged living room floor. There have been two documented instances of blocked exits triggering fire safety complaints in 2007 and 2010, though both were promptly corrected. Infrastructure improvements include a foundation subdrain and sump system installed in 2003 and sliding door replacement completed in 2004. Recent municipal service calls from late 2024 indicate ongoing maintenance needs, including issues with lighting, water leaks, and a collapsed sidewalk, though many of these cases were resolved or required no further action. The building's history also includes a brief period of illegal unit allegations in 1998, while more recent planning records show an approved proposal to build new two-unit condominiums on the site, though this appears to have been connected to a closed appeal.

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

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Risk rating

How 339-341 West Portal 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
33th percentile

Out of 24 buildings in this neighborhood, 16 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.

Property class: apartment building

Apartment building — this property classification influences expected violation rates.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

12-Month severity forecast
No violation 39.3%
Moderate concern 50.4%
Severe concern 10.3%
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

339-341 West Portal Ave event timeline

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

2024
311 Request Apr 26
Graffiti on sidewalk in front of property
Sidewalk in front of property - Not Offensive

See all 10 events

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

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Every record we have

Full data for 339-341 West Portal Ave apartments

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

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