8439 S Blackstone Chicago
This building has a substantial enforcement record over the last seven years, and our model predicts continuing maintenance failures over 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 10 building violations (7y), above the Avalon Park average of 3.1.
What's in the 8439 S Blackstone Chicago report
| Units | 10 |
|---|---|
| Year built | 1920 |
| Stories | — |
| Building area | 7,736 sq ft |
| Property class | 314 |
| PIN (Cook County parcel) | 20354080010000 |
Registered owner per Cook County Assessor records.
Landlord portfolio
Other Chicago properties this owner holds, with a risk rating for each.
Unlock complete reportThe 10-unit, 1920-built residential building at 8439 S Blackstone in Chicago's Avalon Park neighborhood has experienced several concerning issues in recent years, with the most significant problems centered around unresolved building code violations from March 2022. These six complaint-driven inspection violations remain open as of the latest data. The property has recorded a total of 10 building violations and 17 service requests in the past seven years, while the owner, CTLTC 008002376084, has faced 76 total building violations and 70 service requests across 4 parcels. Recent infrastructure concerns include a water lead test kit request from July 2025 that remains unresolved, which is particularly noteworthy given public health concerns related to lead contamination. The building's documented issues also include plumbing violations (closed) from December 2025, a leak check request (closed) from May 2025, and a no water complaint (closed) from November 2024. While there have been some resolved service requests, the persistent nature of the violations and open requests, particularly those related to building safety and water quality, suggests ongoing maintenance and safety oversight challenges at this property.
AI-generated · may contain errors · check the source data tables below
How 8439 S Blackstone 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 256 buildings in this neighborhood, 243 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.
8439 S Blackstone Chicago apartment reviews
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8439 S Blackstone Chicago event timeline
Building violations, environmental complaints and enforcement, permits, scofflaw listings, and 311 calls — most recent records in order.
See all 10 events
Full history back to 2022 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 8439 S Blackstone 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.
| 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 8439 S Blackstone Chicago compares to the neighborhood
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