949 N Keystone Ave
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 Humboldt Park average of 1.3.
What's in the 949 N Keystone Ave report
| Units | 2 |
|---|---|
| Year built | 1910 |
| Stories | — |
| Building area | 1,656 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 16034230040000 |
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 949 N Keystone Ave in the Humboldt Park neighborhood is a century-old structure owned by Marilyn G. Herns since 1910. The property has maintained a remarkably clean service record over the past seven years, with only one documented 311 service request in the system, which was filed relatively recently on November 23, 2025, regarding a stray animal complaint. This request has since been closed. The building's overall maintenance history shows minimal issues requiring city intervention, with no documented service requests related to building systems, safety concerns, or resident complaints, suggesting proper upkeep and management of the property. The single nature of the service request, being non-urgent and unrelated to the building's condition or infrastructure, indicates that there have been no significant problems reported by residents during this period.
AI-generated · may contain errors · check the source data tables below
How 949 N Keystone 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 6211 buildings in this neighborhood, 124 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.
949 N Keystone Ave apartment reviews
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949 N Keystone Ave 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 2025 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 949 N Keystone 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