4750 S Union 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 New City average of 1.6.
What's in the 4750 S Union Ave report
| Units | 3 |
|---|---|
| Year built | 1905 |
| Stories | — |
| Building area | 4,104 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 20091030450000 |
Registered owner per Cook County Assessor records.
Landlord portfolio
Other Chicago properties this owner holds, with risk grades for each.
Unlock complete reportThe three-unit residential building at 4750 S Union Ave in Chicago's New City neighborhood is a three-story structure built in 1905, currently owned by Declan Jay O'Connor. Over the past seven years, the property has generated a total of three service requests through the city's 311 system, all of which have been appropriately addressed and closed. The most recent issue, reported in November 2025, involved a rodent baiting complaint, which was resolved through municipal intervention. Prior to this, in May 2025, there was a graffiti-related issue requiring removal services. The earliest of the three recorded incidents, dating back to May 2024, concerned maintenance of garbage carts, suggesting some attention to waste management infrastructure at the property. While the building has experienced these documented issues, it's worth noting that there haven't been any more recent complaints or service requests on record since 2025, though the relative recency of these issues should be considered when evaluating the property's maintenance history.
AI-generated · may contain errors · check the source data tables below
How 4750 S Union 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 4189 buildings in this neighborhood, 2555 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.
4750 S Union Ave apartment reviews
Real experiences from people who have lived here. Share yours to help other renters decide.
Share your experience — Help other renters by leaving an honest apartment review
Loading reviews…
4750 S Union Ave event timeline
Building violations, environmental complaints and enforcement, permits, scofflaw listings, and 311 calls — most recent records in order.
See all 3 events
Full history back to 2024 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 4750 S Union 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.
| Violation # | Date | Category | Status | Address |
|---|---|---|---|---|
| Loading… | ||||
What this is
Violations issued for failure to register or maintain a vacant or abandoned building.
| Docket # | Violation # | Issued | Department | Type | Disposition | Total Fines |
|---|---|---|---|---|---|---|
| Loading… | ||||||
What this is
Building permits issued by the City of Chicago for new construction, alterations, and repairs at this parcel.
| Permit # | Issued | Status | Description |
|---|---|---|---|
| Loading… | |||
What this is
Chicago 311 service requests recorded at this parcel — maintenance complaints and quality-of-life requests.
| SR # | Created | Type | Department | Status |
|---|---|---|---|---|
| Loading… | ||||
What this is
Environmental complaints filed about this property with the City of Chicago.
| Complaint # | Date | Type | Inspector | Resolution | Resolved |
|---|---|---|---|---|---|
| Loading… | |||||
What this is
Formal environmental enforcement cases brought against this property.
| Case # | Date | Type | Violation | Disposition | Status | Fine |
|---|---|---|---|---|---|---|
| Loading… | ||||||
Affordable Rental Housing requires a full report
Included with every paid plan.
Unlock complete reportAsbestos & Demolition Notifications requires a full report
Included with every paid plan.
Unlock complete reportLook up the next apartment before you sign
Search any Chicago address free — no account needed to see the risk rating.
Get the complete picture
Every plan unlocks the complete report: all Chicago datasets, full history, landlord portfolio, and PDF & Excel exports.
Report Bundle
For the buildings you're deciding on right now
$10 one-time
~$3.33 per building. No subscription ever. Each credit unlocks one building's premium report for 30 days.
- 3 full AI-powered reports
- Download PDF reports
- Advanced safety analysis
- Compare multiple buildings
- Credits never expire until you use them
- Full public records (200 rows per dataset)
Apartment Hunter
For a wide search across many buildings
$39 one-time
30 reports — ~$1.30 each. No subscription ever.
- 30 full AI-powered reports
- Download PDF reports
- Advanced safety analysis
- Compare multiple buildings
- Credits never expire until you use them
- Full public records (200 rows per dataset)
Renter
For the weeks when the stakes are highest
$10/mo
Billed $120/year — save $24 vs monthly
- Unlimited basic reports
- 5 premium AI reports per month
- Download PDF & Excel reports
- Full public records (200 rows per dataset)
- Full event timeline — every year of history
- Landlord portfolio & ownership insights
Less than $0.34/day. Cancel anytime.
Cancel anytime · Data sourced from the City of Chicago Department of Buildings, Chicago 311, Cook County Assessor & the Chicago Data Portal