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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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1909
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

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).

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 three-story, ten-unit residential building at 50 Leroy Place in Nob Hill, owned by Ming & Manling Koo 2012 Irr, has undergone significant changes and faced various challenges over the past several years. Built in 1909, the property is currently undergoing a major transformation involving the conversion of a former laundromat into three ADUs, complete with fire sprinklers and upgraded safety features, with construction costs totaling $778,000. This project has generated multiple complaints from residents about after-hours noisy work and machinery, particularly in May and June 2026, which prompted multiple inspections by the Building Inspection Division and Code Enforcement Section.

The building has seen substantial interior improvements in recent years, including completed renovations of Unit 5 (kitchen and bathroom remodel) in 2019 and Unit 8 (bathroom and kitchen remodel) in 2020. In early 2025, important safety upgrades were implemented, including fire alarm decibel level confirmations in sleeping areas. Recent service requests (as of 2026) indicate ongoing concerns with construction activities, as well as some public health and environmental issues that were referred to BAAQMD. Additional service requests have been made regarding illegal parking in the area, though responses to these calls were unable to locate the reported vehicles. While the building has experienced these various issues, it's important to note that the majority of the documented permits and completed improvements demonstrate ongoing investment in property maintenance and modernization.

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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8 found
The story over time

50 Leroy Pl event timeline

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

2026
311 Request Jul 31
Garbage and debris
human waste or urine
311 RequestJul 27
Other illegal parking

See all 23 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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