5541 S Mason 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 Garfield Ridge average of 0.8.
What's in the 5541 S Mason Ave report
| Units | 2 |
|---|---|
| Year built | 1956 |
| Stories | — |
| Building area | 2,455 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 19172010650000 |
Registered owner per Cook County Assessor records.
Landlord portfolio
Other Chicago properties this owner holds, with a risk rating for each.
Unlock complete reportThe two-unit residential building at 5541 S Mason Ave in Garfield Ridge, currently owned by Andrzej Rybiarczyk, was constructed in 1956 and has generated a total of 12 service requests through the 311 system over the past seven years. The most recent service request, filed in June 2026, concerns garbage cart maintenance and remains open. A notable cluster of animal-related incidents occurred in late 2025, including both a vicious animal and a stray animal complaint within a day of each other in September. The property has also experienced some maintenance challenges, with a water in basement complaint registered in August 2025 and a tree removal inspection request from December 2024, both of which have been resolved. Earlier in 2025, there was a public way inspection request that was closed after investigation. While the building's service request history shows regular maintenance and animal-related concerns typical of urban settings, it's worth noting that the most significant recent issues appear to be related to refuse management (the open garbage cart maintenance request) and water management (the previously closed water in basement complaint).
AI-generated · may contain errors · check the source data tables below
How 5541 S 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
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 626 buildings in this neighborhood, 169 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.
5541 S Mason Ave apartment reviews
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5541 S Mason Ave event timeline
Building violations, environmental complaints and enforcement, permits, scofflaw listings, and 311 calls — most recent records in order.
See all 2 events
Full history back to 2022 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 5541 S 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.
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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