4964 N Mason Ave
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 Jefferson Park average of 0.4.
What's in the 4964 N Mason Ave report
| Units | 2 |
|---|---|
| Year built | 1923 |
| Stories | — |
| Building area | 2,736 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 13084170870000 |
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 4964 N Mason Ave in the Jefferson Park neighborhood, built in 1923 and currently owned by Luis Corona, has generated a total of eight 311 service requests over the past seven years, with all requests clustered in the last two years (2024-2025). The most recent pattern of service requests indicates an ongoing issue with tree maintenance in the vicinity, with four of the eight requests specifically related to tree debris clean-up (closed), one tree emergency (closed), and one tree planting request (open) in May 2025. Additionally, there was one abandoned vehicle complaint (closed) recorded on July 30, 2025, though this appears to be an isolated incident not directly related to the building's immediate environment. The frequency of tree-related service requests suggests this is a recurring concern for the property and its surroundings, though all reported issues have been promptly addressed through city services, with the exception of the most recent planting request which remains open as of October 2023.
AI-generated · may contain errors · check the source data tables below
How 4964 N Mason 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 1617 buildings in this neighborhood, 1180 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.
4964 N Mason Ave apartment reviews
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4964 N Mason Ave 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 2024 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 4964 N Mason 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.
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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