Free SF apartment background check

9 Sumner St

South of Market, SF 94103 3730056 2 units · 2 fl · 1910

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 South of Market
At or below average
avg 3.3
0
FewerMore

This building has 0 novs (7y), at or below the South of Market average of 3.3.

Rent & eviction protection

Is 9 Sumner 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 1910
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RED
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 built1910
Total area2,500 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3730056
Ownership

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

Owner name
Reynolds Glenn
Mailing address
9 Sumner St San Francisco CA 94103
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.

9 A Sumner St, San Francisco, CA 94103
9 Sumner St, San Francisco, CA 94103
9 C Sumner St, San Francisco, CA 94103
9 B Sumner St, San Francisco, CA 94103
Augrented Insights
Initial analysis

The two-unit residential building at 9 Sumner Street in San Francisco's South of Market neighborhood has a documented history spanning several decades, with significant attention required to its maintenance and regulatory compliance. Built in 1910, this two-story flats/duplex structure has undergone various permit processes between 1986 and 1998, including water service installation, deck repairs, and an attempt to add a garage door to the lower unit. A notable housing inspection complaint from 1996 regarding an illegal basement unit with inadequate heating and metering was eventually resolved by January 1997. More recently, there was a violation related to short-term rental activity through Airbnb, which was abated with penalties paid.

The property has experienced ongoing environmental challenges in the immediate vicinity, particularly during 2024, with multiple incidents of human waste, medical waste (needles), and general garbage issues reported through 311 calls. The building's surroundings have required frequent attention from Street and Environmental Services, with eight such reports between January and October 2024. There were also two driveway blocking incidents in 2024 that required parking enforcement intervention. While the most recent building permits and complaints suggest no active structural or safety issues with the building itself, the area around the property has faced recurring sanitation and maintenance challenges that have required municipal intervention.

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

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Risk rating

How 9 Sumner 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
73th percentile

Out of 430 buildings in this neighborhood, 116 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
81%
No DBI
violation
19%
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 (ZIP code)

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

Building size

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

Building age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

12-Month severity forecast
No violation 72.1%
Moderate concern 16.9%
Severe concern 11.0%
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

9 Sumner St event timeline

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

2026
311 Request Mar 02
Garbage and debris
human waste or urine

See all 5 events

Full history back to 2024 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 9 Sumner St 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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