3910 N Janssen Ave 1
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 Lake View average of 1.0.
What's in the 3910 N Janssen Ave 1 report
| Units | 3 |
|---|---|
| Year built | 1921 |
| Stories | — |
| Building area | 2,655 sq ft |
| Property class | 211 |
| PIN (Cook County parcel) | 14201010390000 |
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 3910 N Janssen Ave in Lake View, owned by Laurentiu Ionescu, has been in existence since 1921 and has maintained a relatively low incidence of municipal service requests over the past quarter-century, with only one environmental complaint recorded in 1997 related to illegal dumping. However, the property has experienced a notable cluster of service requests in recent years, particularly during 2025, with six separate service calls concentrated between April and November of that year. These requests primarily involved public safety concerns, including multiple reports of lighting issues (both street and alley lights), as well as complaints about rodent problems, indicating potential environmental hygiene challenges in the immediate vicinity. The most recent recorded incident was a rodent-related service call in November 2025. Despite these recent service requests, it's worth noting that all reported issues have been marked as closed, suggesting that the city has responded to and addressed these concerns as they arose. The building's documented history remains limited to these specific incidents, with no recorded structural or safety violations in the available data.
AI-generated · may contain errors · check the source data tables below
How 3910 N Janssen Ave 1'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 3452 buildings in this neighborhood, 1105 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.
3910 N Janssen Ave 1 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…
3910 N Janssen Ave 1 event timeline
Building violations, environmental complaints and enforcement, permits, scofflaw listings, and 311 calls — most recent records in order.
See all 4 events
Full history back to 1997 — violations, complaints, permits, and 311 calls.
Unlock complete timelineFull data for 3910 N Janssen Ave 1 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 3910 N Janssen Ave 1 compares to the neighborhood
This building against comparable properties in Lake View. 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