Flood Zones: Des Plaines vs Tinley Park
How do flood zones rules compare between Des Plaines, IL and Tinley Park, IL?
Des Plaines has fewer restrictions than Tinley Park.
Des Plaines, IL
Cook County
Des Plaines participates in NFIP. The Des Plaines River runs through the city and portions are in FEMA flood hazard areas. NFIP flood insurance required with federally backed mortgages in SFHAs.
View full Des Plaines rules →Tinley Park, IL
Cook County
Tinley Park participates in the National Flood Insurance Program and enforces floodplain development regulations for areas mapped as Special Flood Hazard Areas on FEMA Flood Insurance Rate Maps. Tinley Creek and its tributaries include mapped flood zones. New construction in the floodplain must meet elevation, floodproofing, and compensatory storage requirements. A floodplain development permit is required for any construction in the SFHA.
View full Tinley Park rules →Key Facts Comparison
| Fact | Des Plaines | Tinley Park |
|---|---|---|
| NFIP | Des Plaines participates | - |
| Flood Risk | Des Plaines River and tributaries — portions in SFHAs | - |
| 50% Rule | Substantial improvement triggers full flood compliance | - |
| Flood Insurance | Required with federally backed mortgages in SFHAs | - |
| Contact | Public Works Engineering: 847-391-5390 | - |
| NFIP Participant | - | Yes |
| Freeboard | - | 1 ft above BFE |
| Floodway Fill | - | Prohibited |
| Compensatory Storage | - | 0-for-0 in fringe |
| Substantial Improvement | - | 50% value trigger |
Highlighted rows indicate differences between cities.
Des Plaines FAQ
Is my property in a flood zone in Des Plaines?
Des Plaines participates in NFIP. The Des Plaines River runs through the city and portions are in FEMA flood hazard areas. NFIP flood insurance required with federally backed mortgages in SFHAs.
Do I need flood insurance in Des Plaines?
NFIP: Des Plaines participates. Flood Risk: Des Plaines River and tributaries — portions in SFHAs. 50% Rule: Substantial improvement triggers full flood compliance. Flood Insurance: Required with federally backed mortgages in SFHAs.
Tinley Park FAQ
Is my Tinley Park property in a FEMA flood zone?
Check the FEMA Flood Map Service Center at msc.fema.gov by entering your address. Areas near Tinley Creek and its tributaries have mapped SFHAs. The Village can also provide flood zone determinations.
Do I need flood insurance?
If your property is in an SFHA and you have a federally-backed mortgage, yes. Even outside SFHAs, flooding is possible and Preferred Risk Policies are relatively inexpensive.
Can I add an addition to my home in a flood zone?
Yes, with a floodplain development permit. If the work qualifies as substantial improvement (exceeds 50% of the structure's market value), the entire structure must be brought into full floodplain compliance including elevation.
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