4146 N Keystone Chicago
Nothing on record for this building in the last seven years, but our model still flags a rising risk of maintenance problems in the next 12 months. That forecast comes from the owner's wider portfolio and the surrounding area, not from this building's own record — treat it as a reason to ask questions, not as evidence of a problem. No public enforcement record to go on. Walk the building, ask the current tenants how repairs get handled, and get any promises in writing.
This building has 0 building violations (7y), at or below the Irving Park average of 0.8.
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 4146 N Keystone Chicago report
| Units | 19 |
|---|---|
| Year built | 1929 |
| Stories | — |
| Building area | 16,482 sq ft |
| Property class | 315 |
| PIN (Cook County parcel) | 13154170130000 |
Registered owner per Cook County Assessor records.
Landlord portfolio
Other Chicago properties this owner holds, with a risk rating for each.
Unlock complete reportThe 19-unit residential building at 4146 N Keystone Avenue in Chicago's Irving Park neighborhood, owned by North Keystone LLC, has been standing since 1929 and has maintained a relatively modest record of service requests and permits over the past seven years. The building's record shows minimal engagement with city services, with only six 311 service requests logged during this period, one of which is a pending building violation as of January 2026. The other documented service requests have involved external issues unrelated to the building's structure or safety, including two tree removal inspections (completed in 2024), an alley pothole complaint (resolved in 2025), and two vehicle-related incidents (a sticker violation and an abandoned vehicle complaint, both closed in 2026). The property's permit activity has been exceptionally limited, with only one building permit recorded in the past seven years, suggesting minimal recent modifications or renovations to the structure. While the overall number of complaints and permits is low, it is notable that the only remaining open service request as of 2026 pertains to a building violation, which may warrant attention once resolved.
AI-generated · may contain errors · check the source data tables below
How 4146 N Keystone Chicago'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 3731 buildings in this neighborhood, 3582 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.
4146 N Keystone Chicago apartment reviews
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4146 N Keystone Chicago event timeline
Building violations, environmental complaints and enforcement, permits, scofflaw listings, and 311 calls — most recent records in order.
See all 1 events
Full history back to 2026 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 4146 N Keystone Chicago 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.
| 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 4146 N Keystone Chicago 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