1638 S Throop St
This building has significantly more problems than most nearby buildings. A handful of unresolved issues. Worth a careful walk-through and pointed questions.
This building has 8 building violations (7y), above the Lower West Side average of 0.9.
What's in the 1638 S Throop St report
| Units | 2 |
|---|---|
| Year built | 1888 |
| Stories | — |
| Building area | 1,764 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 17203050540000 |
Registered owner per Cook County Assessor records.
Landlord portfolio
Other Chicago properties this owner holds, with risk grades for each.
Unlock complete reportThe property at 1638 S Throop St in Chicago's Lower West Side is a 2-unit residential building constructed in 1888 and currently owned by Judith M Siljander. The building's recent history (2022-2026) raises several concerns, particularly in late 2024 when multiple unresolved building code violations were recorded between November 14 and November 18, including both complaint-driven and permit-related inspections. Prior to this, the building had six other unresolved building code violations from September 2022. The property has experienced various service requests over the past seven years, with the most recent being two tree trim requests in January 2026, and the removal of graffiti and addressing a fly dumping complaint in 2024. An environmental complaint regarding construction and demolition was filed in May 2026, though the investigation found no violations. The building's permit history is minimal, with only two permits recorded in the past seven years, which is notably low for a property of this age and size.
AI-generated · may contain errors · check the source data tables below
How 1638 S Throop 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 3674 buildings in this neighborhood, 3196 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.
1638 S Throop St apartment reviews
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1638 S Throop St event timeline
Building violations, environmental complaints and enforcement, permits, scofflaw listings, and 311 calls — most recent records in order.
See all 11 events
Full history back to 2022 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 1638 S Throop 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