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4049-4051 Judah St

Outer Sunset, SF 94122 1808048 2 units · 2 fl · 1937

This building has more problems than most buildings in this neighborhood. 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
1
FewerMore

This building has 1 novs (7y), at or below the Outer Sunset average of 1.8.

Rent & eviction protection

Is 4049-4051 Judah St 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 1937
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
NC1
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 built1937
Total area3,000 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1808048
Ownership

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

Owner name
Sin, Charles & Sonia
Mailing address
1217 Glacier Ave Pacifica CA 94044
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.

4049 Judah St, San Francisco, CA 94122
4051 Judah St, San Francisco, CA 94122
Augrented Insights
Initial analysis

The two-unit multi-family residential building at 4049-4051 Judah Street in San Francisco's Outer Sunset neighborhood, owned by Charles and Sonia Sin, has a documented history spanning several decades since its construction in 1937. Recent significant issues include a 2022 plumbing incident that resulted in multiple violations, including unauthorized plumbing work, unpermitted water heater installations, and a missing plumbing vent, though these were resolved by October 2022. The building has experienced recurring maintenance and compliance challenges, with permit records showing efforts to modify interior spaces in the 1980s and 1990s, including partition wall installations and subsequent removal to address violations.

The property has been the subject of various infrastructure and maintenance concerns in recent years, particularly during 2022-2023, with multiple 311 calls regarding street conditions, including reports of human/animal waste and graffiti on public areas near the property. Three shared spaces-related fire complaints were filed between 2020-2021, though they were deferred. External environmental issues have persisted, as evidenced by recent calls regarding damaged property (2024) and sidewalk conditions, while several past complaints about sidewalk cleanliness and debris were resolved by 2024. The building's location and age have contributed to an ongoing need for maintenance and compliance with municipal regulations, particularly regarding unauthorized modifications and infrastructure updates.

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

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Risk rating

How 4049-4051 Judah St'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
23th percentile

Out of 632 buildings in this neighborhood, 487 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
55%
No DBI
violation
45%
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.

DBI tenant complaints (past 7 years)

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

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

Property class: apartment building

Apartment building — this property classification influences expected violation rates.

12-Month severity forecast
No violation 48.8%
Moderate concern 30.4%
Severe concern 20.8%
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

4049-4051 Judah St event timeline

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

2026
311 Request May 01
Not offensive
bike rack

See all 11 events

Full history back to 2020 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 4049-4051 Judah St apartments

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

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