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549 39Th Ave

Outer Richmond, SF 94121 1505008 2 units · 2 fl · 1964

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
Above average
avg 0.7
8
FewerMore

This building has 8 novs (7y), above the Outer Richmond average of 0.7.

Rent & eviction protection

Is 549 39Th 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 1964
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 built1964
Total area3,238 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1505008
Ownership

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

Owner name
Koon Sandra & Hsieh Yun Chi
Mailing address
551 39th Ave San Francisco CA 94121
Last sale
062100

Landlord portfolio

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

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Augrented Insights
Initial analysis

The two-unit multi-family residential building at 549 39th Avenue in the Outer Richmond, built in 1964, has experienced several significant maintenance and compliance issues over its recent history. Most notably, in 2017, the property faced multiple building violations and complaints regarding weatherproofing on exterior walls, lead paint hazards, fire safety concerns, and yard maintenance issues, which were all addressed by August 2019 through a $2,500 repair project that included weatherproofing and painting visible to the street. Earlier, in 2009, there was an incident involving unpermitted construction on the roof, measuring approximately 10x8x8 feet, which was required to be removed and reverted to its original state at a cost of $1,000. The building's history also includes a 1996 complaint about a non-functional oven possibly indicating concerns about an illegal unit, though this was resolved quickly within five days.

More recent concerns include a May 2024 citation for a tripping hazard with uncovered wires and cables, noted as scheduled for renovation in the next fiscal year, as well as another tripping hazard at a private lot. A 2017 incident involving sewage backup was resolved, as were various other maintenance issues documented through 311 calls, including sidewalk defects and general cleaning needs. The current owner, Koon Sandra & Hsieh Yun Chi, has maintained the property through proper channels since the multiple violations of 2017, with all building permits showing as either complete or issued for necessary repairs and improvements.

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

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Risk rating

How 549 39Th 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
91th percentile

Out of 1040 buildings in this neighborhood, 94 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
92%
No DBI
violation
8%
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 82.6%
Moderate concern 11.3%
Severe concern 6.1%
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

549 39Th 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 549 39Th 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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