Free SF apartment background check

339-341 West Portal Ave

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

A handful of records on file over the last seven years, and our model sees a moderate chance of more in the next 12 months. A few records worth reading before you sign. Check whether they were closed out, and ask what was actually fixed.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in West Portal — not a forecast
At or below average
avg 2.0
0
FewerMore

This building has 0 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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1935
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

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).

Mailing address
Po Box 27658 San Francisco CA 94127
Last sale
January 18, 1990

Landlord portfolio

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

Unlock complete report
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

Free account unlocks the full analysis — plus 2× more records across all data categories and the complete landlord portfolio.
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

Lower risk — safer than most nearby

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Typical — about average for the neighborhood

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Higher risk — riskier than most nearby

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
33rdpercentile

Out of 24 buildings in this neighborhood, 16 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.

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 risk forecast
Moderate failure risk 56%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

339-341 West Portal Ave apartment reviews

Real experiences from people who have lived here. Share yours to help other renters decide.

Share your experience — Help other renters by leaving an honest apartment review

Create account

Loading reviews…

On the map

Compare nearby alternatives

This building and nearby alternatives, color-coded by risk level. Click any marker to explore.

Buildings nearby
8 found
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.

Unlock complete timeline
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.

Side by side

How 339-341 West Portal Ave compares to the neighborhood

This building against comparable properties in West Portal. Toggle filters to narrow the peer group.

Loading comparables…
Still apartment hunting in SF?

Look up the next apartment before you sign

Search any SF address free — no account needed to see the risk rating.

Search another address Get full report
Simple pricing

Get the complete picture

Every plan unlocks the complete report: all 13 SF datasets, full history, landlord portfolio, and PDF & Excel exports.

Pay once

Report Bundle

For the buildings you're deciding on right now

$10one time

3premium reports

$3.33 per report · charged once, never renews

Each credit unlocks one building's premium report for 30 days.

  • 3 premium reports — AI executive summary included
  • Live data across all 27 public record types
  • 200 records per dataset
  • PDF & Excel exports included
  • Compare up to 10 buildings side-by-side
  • Credits never expire until you use them
Buy 3 Reports — $10
Pay once

Apartment Hunter

For a wide search across many buildings

$39one time

30premium reports

$1.30 per report · charged once, never renews

Each credit unlocks one building's premium report for 30 days.

  • 30 premium reports — AI executive summary included
  • Live data across all 27 public record types
  • 200 records per dataset
  • PDF & Excel exports included
  • Compare up to 10 buildings side-by-side
  • Credits never expire until you use them
Buy 30 Reports — $39
Most Popular Current plan
Subscription

Renter

For the weeks when the stakes are highest

$8.33/mo

5premium reports / mo

Billed $100/year — save $44 vs monthly

Renews automatically until you cancel.

  • Unlimited standard reports — 50 records per dataset
  • 5 premium AI reports per month — live data, 200 records per dataset, all 27 record types
  • PDF & Excel exports on every report
  • Compare up to 10 buildings side-by-side
  • Full event timeline — every year of history
  • Landlord portfolio & ownership insights
Start Your Search

Less than $0.28/day. Cancel anytime.

Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

Watch 339-341 West Portal Ave
Get alerted the moment a new violation or complaint is filed.