4125 S Montgomery 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 Brighton Park average of 0.8.
What's in the 4125 S Montgomery Ave report
| Units | 3 |
|---|---|
| Year built | 1926 |
| Stories | — |
| Building area | 2,443 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 19012110310000 |
Registered owner per Cook County Assessor records.
Landlord portfolio
Other Chicago properties this owner holds, with a risk rating for each.
Unlock complete reportThe three-unit residential building at 4125 S Montgomery Ave in Brighton Park, owned by Maria C Diaz, was constructed in 1926 and has been relatively stable over the past seven years, with a total of nine documented 311 service requests. Most of the recent activity (five out of nine requests) occurred in 2025, focusing primarily on utilities and infrastructure, including two alley light outages in July 2025 and a water lead test kit request around the same time. The building has also required some municipal services such as finance parking code enforcement reviews, occurring twice in 2025, suggesting potential issues with parking regulations in the area. Additionally, there was a request for a blue recycling cart, indicating the owner's interest in maintaining proper waste management practices. While the number of requests is not unusually high for a building of this age and size, the concentration of service requests in mid-2025 related to public infrastructure and utilities warrants attention to local service conditions during that period.
AI-generated · may contain errors · check the source data tables below
How 4125 S Montgomery 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 3962 buildings in this neighborhood, 1862 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.
4125 S Montgomery Ave apartment reviews
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4125 S Montgomery Ave event timeline
Building violations, environmental complaints and enforcement, permits, scofflaw listings, and 311 calls — most recent records in order.
See all 1 events
Full history back to 2025 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 4125 S Montgomery 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 4125 S Montgomery 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