1905 N Kostner Ave
This building has a substantial enforcement record over the last seven years, but recent activity points to a low risk of further maintenance problems in the next 12 months. Read the records below before you sign. Ask which issues were resolved, get repair commitments in writing, and inspect the unit yourself.
This building has 3 building violations (7y), above the Hermosa average of 0.9.
What's in the 1905 N Kostner Ave report
| Units | 2 |
|---|---|
| Year built | 1914 |
| Stories | — |
| Building area | 1,876 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 13344000150000 |
Registered owner per Cook County Assessor records.
Landlord portfolio
Other Chicago properties this owner holds, with a risk rating for each.
Unlock complete reportThe two-unit residential building at 1905 N Kostner Ave in Chicago's Hermosa neighborhood, owned by Porfirio Aguilar, is a century-old structure built in 1914 that has recently experienced a concerning pattern of unresolved issues. Most significantly, there are currently three open building code violations as of February 11, 2026, all triggered by complaint-driven inspections. The property has also generated notable concern regarding pest control, with multiple rodent-related incidents; while one rat complaint from May 19, 2026 has been resolved, two additional rat complaints were filed in June 2026, with the most recent still open as of June 16, 2026.
AI-generated · may contain errors · check the source data tables below
How 1905 N Kostner 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 1618 buildings in this neighborhood, 1084 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.
1905 N Kostner Ave apartment reviews
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1905 N Kostner Ave event timeline
Building violations, environmental complaints and enforcement, permits, scofflaw listings, and 311 calls — most recent records in order.
See all 9 events
Full history back to 2026 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 1905 N Kostner 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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Unlock complete reportHow 1905 N Kostner Ave compares to the neighborhood
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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