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831 Wisconsin St

Potrero Hill, SF 94107 4162067 2 units · 1 fl · 1931

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 Potrero Hill
At or below average
avg 1.1
0
FewerMore

This building has 0 novs (7y), at or below the Potrero Hill average of 1.1.

Rent & eviction protection

Is 831 Wisconsin 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 1931
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
Floors1
Year built1931
Total area2,008 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot4162067
Ownership

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

Owner name
Pappas Luke
Mailing address
831 Wisconsin St San Francisco CA 94107
Last sale
072517

Landlord portfolio

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

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Augrented Insights
Initial analysis

831 Wisconsin Street is a two-unit, one-story multi-family residential building located in Potrero Hill and owned by Luke Pappas. Built in 1931, this flats/duplex-style structure has undergone significant modifications and faced several challenges over recent years. The most pressing concern is an active code violation from October 2017 regarding unauthorized raising of the rear building by 6-8 feet, which was later addressed through multiple permits and compliance actions including a voluntary seismic retrofit in 2019 costing $250,000. The property has seen substantial work between 2017 and 2020, including structural strengthening, remediation of dry rot, reroofing, and attempts to add additional dwelling units (ADUs), though some permit applications for ADU additions were withdrawn or cancelled.

The building's recent history has been marked by various maintenance and compliance issues, including a fire complaint regarding exit maintenance in 2017 (ruled as having no merit) and significant construction work to address both structural and safety concerns. Of note, there has been a concerning pattern of sanitation issues reported in the vicinity of the property in 2024, with multiple 311 calls regarding garbage, debris, and instances of human waste or urine on the street, though these are external to the building itself. The property also experienced a tenant buyout in 2016 for $500, though only one tenant was involved in this transaction. While the building has undergone numerous improvements and compliance corrections, the active nature of some violations and the pattern of recent sanitation complaints in the area warrant attention to the building's ongoing management and maintenance practices.

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

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Risk rating

How 831 Wisconsin 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
57th percentile

Out of 726 buildings in this neighborhood, 312 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
77%
No DBI
violation
23%
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.

Neighborhood location

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

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 76.2%
Moderate concern 21.7%
Severe concern 2.0%
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

831 Wisconsin St event timeline

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

2025
Planning Project Oct 14
To comply with complaint #201712431 and planning ENF case #2017013833. Existing one-story rear yard cottage to be expanded with vertical addition (mezzanine) to create an ADU dwelling unit. The Sanborn maps going back to 1919 and 1990 maps show the back structure as an existing dwelling unit.
On Hold

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

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Every record we have

Full data for 831 Wisconsin St apartments

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

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