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1409-1411 41St Ave

Outer Sunset, SF 94122 1812001B 2 units · 2 fl · 1945

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 Sunset
At or below average
avg 1.8
0
FewerMore

This building has 0 novs (7y), at or below the Outer Sunset average of 1.8.

Rent & eviction protection

Is 1409-1411 41St 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 1945
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 built1945
Total area2,399 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1812001B
Ownership

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

Owner name
Lee Family Trust
Mailing address
Lee Chung Ton & Yee Man Ton 422 Lawton St San Francisco CA 94122
Last sale
090914

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.

1409 41st Ave, San Francisco, CA 94122
1411 41st Ave, San Francisco, CA 94122
Augrented Insights
Initial analysis

The two-unit residential building at 1409-1411 41st Avenue in San Francisco's Outer Sunset neighborhood is a two-story flats and duplex structure built in 1945, currently owned by the Lee Family Trust. The property's renovation history includes a significant ground floor conversion in 2001 that transformed a storage area into a family room and bedroom, a completed stucco removal and dry rot repair project from 1986, and a reroofing attempt in 1999 which unfortunately expired without completion. More recent improvements include the installation of a garage door opener in 2003, though this permit also expired.

The building's maintenance and incident history over the past decade and more shows relatively few internal issues, with only one significant plumbing incident recorded - a sewer vent problem in 2016 that was promptly resolved. The property has experienced occasional exterior maintenance challenges typical of urban environments, including three separate street cleaning cases in 2009 and 2010 involving loose garbage, and a pavement defect report in 2018. The most recent exterior issue was a defaced parking sign in 2021, which was successfully addressed by the city. While the building's documented permit and incident history shows regular maintenance work and prompt responses to exterior issues, it's worth noting that several permits from the late 20th century and early 2000s appear to have either expired or lacked recorded completion in the system.

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

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Risk rating

How 1409-1411 41St 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
51th percentile

Out of 632 buildings in this neighborhood, 310 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
79%
No DBI
violation
21%
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.

DBI complaints, owner's portfolio

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

Owner's portfolio size

Number of SF parcels this owner is registered on — larger portfolios have distinct risk patterns.

12-Month severity forecast
No violation 81.9%
Moderate concern 13.2%
Severe concern 4.9%
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

1409-1411 41St Ave event timeline

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

2025
311 Request Aug 22
Not offensive
pole

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Full history back to 2025 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1409-1411 41St 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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