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509-511 44Th Ave

Outer Richmond, SF 94121 1500001B 2 units · 2 fl · 1948

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 509-511 44Th 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 1948
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RM1
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 built1948
Total area2,600 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot1500001B
Ownership

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

Owner name
Nancy D Lee Tr
Mailing address
Lee Nancy Darlene Trustee 121 Laurel Ave Millbrae CA 94030
Last sale
000000

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.

509 44th Ave, San Francisco, CA 94121
511 44th Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The property at 509-511 44th Avenue in San Francisco's Outer Richmond district is a two-story, two-unit multi-family residential building that was constructed in 1948. The building's historical records show two roofing projects were undertaken in early 1994 (permit numbers 9419740 and 9401417), though both permits have since expired without current roofing information available in the records. More recently, there have been two significant incidents requiring external agency involvement: in May 2017, the Department of Public Health's Environmental Health division handled a case transfer related to a general complaint involving healthy housing and vector control, and in October 2019, there was a report of an abandoned vehicle situation that was resolved when the vehicle was no longer present upon inspection. While both of these incidents required attention, they were external to the building itself and represent typical urban neighborhood occurrences rather than specific building-related issues.

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

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Risk rating

How 509-511 44Th 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
69th percentile

Out of 1040 buildings in this neighborhood, 322 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
88%
No DBI
violation
12%
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.

DBI complaint rate, owner's portfolio

Per-building complaint rate across the owner's portfolio.

12-Month severity forecast
No violation 77.0%
Moderate concern 15.4%
Severe concern 7.6%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

509-511 44Th Ave apartment reviews

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On the map

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The story over time

509-511 44Th Ave event timeline

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

2025
Building Permit Nov 04
Replace 12 windows with the same size and style. new windows visible from the street and vinyl materials.
$7,000 · Complete
Planning RecordNov 04
replace all front windows witin existing openings.

See all 2 events

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

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Every record we have

Full data for 509-511 44Th 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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