520 N Ada St
This building has more problems than most buildings in this neighborhood. 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 West Town average of 1.0.
What's in the 520 N Ada St report
| Units | 2 |
|---|---|
| Year built | 1885 |
| Stories | — |
| Building area | 2,080 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 17081240170000 |
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 520 N Ada Street in Chicago's West Town neighborhood is a historic property dating back to 1885, currently owned by Robert and Alice Korn. The building's recent history over the past seven years shows relatively minimal major maintenance activity, with only one building permit recorded, though this should not necessarily raise concerns as permits are not always required for routine maintenance. The property has generated a total of 26 service requests through the city's 311 system during this period, with the most significant cluster of recent activity occurring in 2026, including open requests for tree-related issues and a sewer cleaning inspection, suggesting some ongoing infrastructure and environmental concerns. Notable past incidents include a rodent baiting complaint in December 2025, though this issue appears to have been addressed relatively quickly. The records also show a couple of abandoned vehicle complaints in 2025 and 2026, both of which were resolved promptly. While the building's age and limited repair records might suggest some potential maintenance needs, the frequency and nature of the service requests mainly pertain to external factors affecting the property rather than structural or internal building issues.
AI-generated · may contain errors · check the source data tables below
How 520 N Ada St'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 2255 buildings in this neighborhood, 1646 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.
520 N Ada St apartment reviews
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520 N Ada St 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 520 N Ada St 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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Cancel anytime · Data sourced from the City of Chicago Department of Buildings, Chicago 311, Cook County Assessor & the Chicago Data Portal