Free SF apartment background check

50 Leroy Pl

Nob Hill, SF 94109 0247033 10 units · 3 fl · 1909

This building has significantly more problems than most nearby buildings. Renters here report frequent, slow-to-fix problems. Get repair promises in writing and check the unit before signing.

NOVs (7y) vs. neighborhood
Compared to a typical building in Nob Hill
At or below average
avg 2.4
0
FewerMore

This building has 0 novs (7y), at or below the Nob Hill average of 2.4.

Rent & eviction protection

Is 50 Leroy Pl 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 1909
2 or more units
10 units
Property type
Multi-Family Residential
Zoning
RM3
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
Units10
Floors3
Year built1909
Total area7,290 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0247033
Ownership

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

Owner name
Ming & Manling Koo 2012 Irr
Mailing address
Koo Ming D & Manling Har H 988 Union St Apt 301 San Francisco CA 94133
Last sale
091919

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.

1347 Sacramento St, San Francisco, CA 94109
1345 Sacramento St, San Francisco, CA 94109
50 Leroy Pl, San Francisco, CA 94109
Augrented Insights
Initial analysis

The 10-unit, 3-story apartment building at 50 Leroy Place in Nob Hill, built in 1909 and currently owned by Ming & Manling Koo 2012 Irr, has undergone significant renovation and maintenance work over the past decade. Between 2015 and 2020, seven of the ten units received comprehensive kitchen and bathroom remodels, with upgrades including new fixtures, appliances, and electrical systems. The building had several concerning issues in 2019, including multiple complaints about leaking radiators, water damage, and mold problems, though these were addressed and resolved. A notably hazardous situation occurred in 2016 when residents reported potentially dangerous odors from the radiator system, which appears to have been remediated. The most recent building-related permit is from January 2025, focusing on fire alarm decibel level compliance in sleeping areas, indicating ongoing attention to safety systems. Recent maintenance work includes a completed drain pipe repair (March 2024) and steam boiler replacement (May 2021).

The property has had its share of challenges, as evidenced by various complaints and violations. A significant cluster of issues was documented in early 2015, including problems with plumbing, electrical systems, and the building's exterior. There were historical violations regarding boiler operation permits in 2001, though these were resolved by 2009. More recent complaints and service requests (2023-2024) have primarily involved exterior maintenance and urban environment issues near the property, such as waste management and tree maintenance, with the most recent being an open case from October 2023 regarding a tree potentially damaging the building. The building's fire safety systems were inspected in October 2021, though the complaint was found to have "No Merit." The property has shown a consistent pattern of maintenance and upgrading over the years, with particular attention paid to unit renovations, electrical systems, and plumbing infrastructure, though past water-related issues suggest some historical challenges with the building's systems that have generally been addressed through subsequent repairs and upgrades.

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

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Risk rating

How 50 Leroy Pl'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
11th percentile

Out of 1125 buildings in this neighborhood, 1001 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
20%
No DBI
violation
80%
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.

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

12-Month severity forecast
No violation 14.2%
Moderate concern 52.4%
Severe concern 33.4%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

50 Leroy Pl apartment reviews

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The story over time

50 Leroy Pl event timeline

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

2026
DBI Complaint Jun 17
Noisy machinery left overnight affecting the entire building. they turn it on after work overnight.
Code Enforcement Section
311 RequestJun 16
Construction private property

See all 22 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 50 Leroy Pl apartments

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

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