2129 N Mason Ave
This building has a substantial enforcement record over the last seven years, and our model predicts continuing maintenance failures over the next 12 months. Read the records below before you sign. Ask which issues were resolved, get repair commitments in writing, and inspect the unit yourself.
This building has 10 building violations (7y), above the Belmont Cragin average of 0.9.
What's in the 2129 N Mason Ave report
| Units | 2 |
|---|---|
| Year built | 1938 |
| Stories | — |
| Building area | 2,441 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 13322200240000 |
Registered owner per Cook County Assessor records.
Landlord portfolio
Other Chicago properties this owner holds, with a risk rating for each.
Unlock complete reportThe property at 2129 N Mason Ave in the Belmont Cragin neighborhood is a two-unit building constructed in 1938, currently owned by an individual named N. Over the past seven years, the building has experienced 10 recorded violations and generated 38 service requests through the city's 311 system. The most significant recent activity occurred in September 2024, when multiple complaint-driven inspections were conducted, resulting in six violations that have since been resolved. The building has faced recurring pest control challenges, particularly evident in early 2026 with five documented rodent-related service requests between March and May, all of which have been closed except for one tree removal inspection request from May 2026 that remains open.
AI-generated · may contain errors · check the source data tables below
How 2129 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
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 4453 buildings in this neighborhood, 4408 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.
2129 N Mason 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…
2129 N Mason Ave event timeline
Building violations, environmental complaints and enforcement, permits, scofflaw listings, and 311 calls — most recent records in order.
See all 10 events
Full history back to 2024 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 2129 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.
| 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 reportHow 2129 N Mason Ave compares to the neighborhood
This building against comparable properties in Belmont Cragin. Toggle filters to narrow the peer group.
No comparable buildings found with the selected filters. Try removing a filter.
Look 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
$10one time
3premium reports
$3.33 per report · charged once, never renews
Each credit unlocks one building's premium report for 30 days.
- 3 premium reports — AI executive summary included
- Live data across all 27 public record types
- 200 records per dataset
- PDF & Excel exports included
- Compare up to 10 buildings side-by-side
- Credits never expire until you use them
Apartment Hunter
For a wide search across many buildings
$39one time
30premium reports
$1.30 per report · charged once, never renews
Each credit unlocks one building's premium report for 30 days.
- 30 premium reports — AI executive summary included
- Live data across all 27 public record types
- 200 records per dataset
- PDF & Excel exports included
- Compare up to 10 buildings side-by-side
- Credits never expire until you use them
Renter
For the weeks when the stakes are highest
$8.33/mo
5premium reports / mo
Billed $100/year — save $44 vs monthly
Renews automatically until you cancel.
- Unlimited standard reports — 50 records per dataset
- 5 premium AI reports per month — live data, 200 records per dataset, all 27 record types
- PDF & Excel exports on every report
- Compare up to 10 buildings side-by-side
- Full event timeline — every year of history
- Landlord portfolio & ownership insights
Less than $0.28/day. Cancel anytime.
Cancel anytime · Data sourced from the City of Chicago Department of Buildings, Chicago 311, Cook County Assessor & the Chicago Data Portal