1150 N Keystone Ave
Nothing on record for this building in the last seven years, and our model puts it at a low risk of maintenance problems over the next 12 months. 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 Humboldt Park average of 1.2.
What's in the 1150 N Keystone Ave report
| Units | 2 |
|---|---|
| Year built | 1912 |
| Stories | — |
| Building area | 1,642 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 16034060230000 |
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 1150 N Keystone Ave in Humboldt Park, owned by Mary Williams and constructed in 1912, has a recorded history of various maintenance issues over the past few years. The most concerning pattern of service requests emerged in October 2025, when multiple leak-related complaints were filed within a short period, totaling three separate reports between October 14 and October 23. While all these service requests were subsequently marked as closed, the clustering of leak complaints in this particular period could indicate potential water infrastructure challenges in the building's plumbing system. In addition to the leak-related issues, there have been two garbage cart maintenance requests (April 2026 and October 2025) and one water-on-street complaint (March 2026), all of which have also been resolved. The building's overall service request history shows a relatively modest number of issues reported to 311 over the past seven years, with a total of 17 requests associated with the owner across three parcels, though the majority of these (11 requests) were specifically linked to the Keystone Avenue address.
AI-generated · may contain errors · check the source data tables below
How 1150 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
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 6229 buildings in this neighborhood, 2242 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.
1150 N Keystone Ave apartment reviews
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1150 N Keystone 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 1150 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.
| 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 1150 N Keystone 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