3911 N Kostner Ave 1St
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.
This building has 0 building violations (7y), at or below the Irving Park average of 0.9.
What's in the 3911 N Kostner Ave 1St report
| Units | 2 |
|---|---|
| Year built | 1912 |
| Stories | — |
| Building area | 3,050 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 13221050290000 |
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 3911 N Kostner Ave in Chicago's Irving Park neighborhood, owned by William Pekoc III, has had relatively few service requests on record over the past seven years, with a total of six documented incidents. The property, constructed in 1912, has maintained an average service request rate for its age and size. The most recent incidents in 2025 involved three sewer-related issues, including inspections for both cleaning and a cave-in, along with one street-related complaint about a pothole. Prior to these, there were two street pothole complaints in 2024, and the only non-road-related request was for tree planting in May 2024, which appears to have been processed as one of the two requests (one marked as open and one as closed). While the recent concentration of sewer and street-related issues might be of interest, it's worth noting that the majority of requests have been successfully closed, suggesting they were addressed by the appropriate authorities.
How 3911 N Kostner Ave 1St'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 3714 buildings in this neighborhood, 2191 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.
3911 N Kostner Ave 1St apartment reviews
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3911 N Kostner Ave 1St 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 2024 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 3911 N Kostner Ave 1St 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