4311 N Mulligan Ave
This building has more problems than most buildings in this neighborhood. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.
This building has 0 building violations (7y), at or below the Portage Park average of 0.7.
What's in the 4311 N Mulligan Ave report
| Units | 2 |
|---|---|
| Year built | 1935 |
| Stories | — |
| Building area | 1,510 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 13173010560000 |
Registered owner per Cook County Assessor records.
Landlord portfolio
Other Chicago properties this owner holds, with risk grades for each.
Unlock complete reportThe two-unit residential building at 4311 N Mulligan Ave in Portage Park, owned by Wieslaw Zak, was constructed in 1935 and has generated a total of 25 service requests through the 311 system in the past seven years. The most recent and notable pattern of activity involves multiple tree-related issues, with five tree removal inspections and two tree emergency situations recorded between July 2025 and June 2026, three of which remain unresolved as of now. While the building itself has not generated significant maintenance or safety concerns, the recurring nature of tree-related issues—especially with two open inspections and one emergency call currently pending resolution—suggests ongoing attention to this particular aspect of the property's environment is required. The other service request logged in April 2025 was a general information call that has already been resolved, but this pattern primarily highlights the property owner's engagement with municipal services regarding external vegetation matters.
AI-generated · may contain errors · check the source data tables below
How 4311 N Mulligan 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
Grade A–B — Low risk
City inspectors rarely find 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. City inspectors have found issues here before and are statistically likely to again.
Out of 3910 buildings in this neighborhood, 2854 are predicted to be safer.
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.
4311 N Mulligan Ave apartment reviews
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4311 N Mulligan Ave event timeline
Building violations, environmental complaints and enforcement, permits, scofflaw listings, and 311 calls — most recent records in order.
See all 5 events
Full history back to 2025 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 4311 N Mulligan 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.
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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.
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What this is
Chicago 311 service requests recorded at this parcel — maintenance complaints and quality-of-life requests.
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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