3920 N Janssen Ave
A handful of records on file over the last seven years, and our model sees a moderate chance of more in the next 12 months. A few records worth reading before you sign. Check whether they were closed out, and ask what was actually fixed.
This building has 1 building violations (7y), at or below the Lake View average of 1.0.
The bar and the rating point different ways because they measure different things: the bar counts building violations already on file, the rating forecasts the next 12 months.
What's in the 3920 N Janssen Ave report
| Units | 3 |
|---|---|
| Year built | 1911 |
| Stories | — |
| Building area | 8,250 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 14201010250000 |
Registered owner per Cook County Assessor records.
Landlord portfolio
Other Chicago properties this owner holds, with a risk rating for each.
Unlock complete reportThe three-unit residential building at 3920 N Janssen Ave in Chicago's Lake View neighborhood, built in 1911 and owned by Wellington & Janssen, has experienced a notable cluster of plumbing and infrastructure issues in recent months. Between September 20 and September 25, 2025, there were five separate service requests related to water issues, including three leak inspections and one sewer cleaning inspection request, followed by two street water complaints in late September. While a blue recycling cart request was submitted and closed in November 2025, this recent spate of water-related issues is the most significant trend in the building's recent history. The building has had minimal official violations, with only one building code violation recorded in July 2021 related to permit inspections, which was subsequently resolved, and one house share prohibition violation in the past seven years. Historical service request data shows a total of 11 building service requests in the past seven years, with the owner having submitted 29 service requests during the same period, though most of these appear to be routine maintenance rather than emergency issues. The building has received four building permits in the last seven years, indicating some level of maintenance and improvements, though the recent concentration of water-related service requests suggests particular attention may be needed in this area.
AI-generated · may contain errors · check the source data tables below
How 3920 N Janssen Ave's risk score is calculated
We trained a model on 7 years of Chicago code enforcement data — building violations, 311 complaint history, environmental enforcement, and owner track records. It estimates the probability that the City of Chicago will find a code violation at this address in the next 12 months. Lower % = safer.
What the score means for you
Lower risk — safer than most nearby
City inspectors rarely find violations here. Strong maintenance history and a clean complaint record.
Typical — about average for the neighborhood
Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.
Higher risk — riskier than most nearby
Elevated violation and complaint history. City inspectors have found issues here before and are statistically likely to again.
Out of 3452 buildings in this neighborhood, 2451 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.
violation
likely
What's driving this score
The data points that most influenced this building's risk rating — ranked by the weight the model placed on each one.
3920 N Janssen Ave apartment reviews
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3920 N Janssen Ave event timeline
Building violations, environmental complaints and enforcement, permits, scofflaw listings, and 311 calls — most recent records in order.
See all 4 events
Full history back to 2021 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 3920 N Janssen Ave apartments
Chicago public datasets for this parcel — building violations, permits, 311 calls, environmental complaints and enforcement, scofflaw listings, and vacant building registrations.
What this is
Violations issued by the City of Chicago Department of Buildings against this parcel.
| Violation # | Date | Category | Status | Address |
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What this is
Violations issued for failure to register or maintain a vacant or abandoned building.
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What this is
Building permits issued by the City of Chicago for new construction, alterations, and repairs at this parcel.
| Permit # | Issued | Status | Description |
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What this is
Chicago 311 service requests recorded at this parcel — maintenance complaints and quality-of-life requests.
| SR # | Created | Type | Department | Status |
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What this is
Environmental complaints filed about this property with the City of Chicago.
| Complaint # | Date | Type | Inspector | Resolution | Resolved |
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What this is
Formal environmental enforcement cases brought against this property.
| Case # | Date | Type | Violation | Disposition | Status | Fine |
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Cancel anytime · Data sourced from the City of Chicago Department of Buildings, Chicago 311, Cook County Assessor & the Chicago Data Portal