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McLean County, IL Environmental Rules: Flood Zones (2026)

Significant Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

FEMA flood zone rules in McLean County, IL, also called floodplain regulations or special flood hazard area (SFHA) rules, determine flood insurance requirements and elevation standards for new construction.

Key Facts

Governing law: McLean County Code § 350-41
Permit issuer: Director of Building and Zoning
Cure period: 10 days after written notice
Fine range: $50 to $750 per offense
Continuing violation: Each day is a separate offense
State authority: 55 ILCS 5/5-1041 and 5/5-1063

FEMA Flood Zone Lookup

FEMA assigns every parcel in the U.S. a flood-hazard designation on its Flood Insurance Rate Maps (FIRMs). Zones starting with A or V are high-risk Special Flood Hazard Areas where federally backed mortgages require NFIP flood insurance. Zone X indicates moderate-to-minimal risk, where insurance is optional but often recommended. Your specific zone determines insurance cost, build elevation, and permit requirements in McLean County, IL.

Zone	What it means	NFIP required?
A	High-risk flood area; 1% annual chance flood, no detailed analysis.	Yes
AE	High-risk; same as A but with established Base Flood Elevations.	Yes
AH	High-risk shallow flooding (1-3 ft), usually ponding.	Yes
AO	High-risk shallow flooding (1-3 ft) with sheet flow on sloping terrain.	Yes
V	High-risk coastal zone subject to wave action (no BFE).	Yes
VE	High-risk coastal zone with wave action and established BFEs.	Yes
X (shaded)	Moderate risk; between the 1% and 0.2% annual chance flood.	Recommended
X	Minimal risk; outside the 0.2% annual chance floodplain.	No

Look up McLean County, IL on the FEMA flood map

FEMA maps update periodically; verify zone before buying flood insurance or building.

Summary

No one may develop in a McLean County floodplain without a development permit from the Director of Building and Zoning, and violators face a $50-$750 fine per day plus a recorded notice of violation on the property's title.

These county ordinances apply to unincorporated areas of McLean County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

Development permit. No person, firm, corporation, or governmental body not exempted by law shall commence any development in the floodplain without first obtaining a development permit from the Director of Building and Zoning. The Director of Building and Zoning shall not issue a development permit if the proposed development does not meet the requirements of this section.

View official code

Full Breakdown

§ 350-41 creates the FP Floodplain Overlay District under authority the state gives counties at 55 ILCS 5/5-1041 and 5/5-1063. It reaches any land shown on the current Flood Insurance Rate Map for McLean County. Subsection E bars any person, firm, corporation or governmental body not exempted by law from commencing development in the floodplain without first getting a development permit from the Director of Building and Zoning, who must refuse the permit if the project doesn't meet the section's requirements. Development is defined broadly: grading, filling, building placement, substantial improvements, levees, dams, fences and even installing a manufactured home or travel trailer for more than 180 days a year all count.

The Director compares the site's elevation to the base flood elevation and gathers copies of every other federal, state and local permit before issuing anything, and won't issue a county permit until those other approvals are in hand. Applications for more than five acres of development must be certified by a licensed Illinois professional engineer under related Chapter 317 rules referenced in this section.

Violations & Fines

Failure to get a floodplain development permit, or breaking a permit's conditions, is a violation the McLean County State's Attorney investigates and must notify the owner of in writing under § 350-41M. The owner then has 10 days to correct it; after that, the County can sue in Circuit Court for an injunction, and any person convicted of violating the section faces a fine of not less than $50 nor more than $750 per offense, with each day of a continuing violation counted separately. The County also records a notice of violation against the property's title, and the State's Attorney must warn the owner that a willful violation can suspend the parcel's federal flood insurance coverage.

Frequently Asked Questions

Who issues McLean County floodplain development permits?

The Director of Building and Zoning issues development permits for the FP Floodplain Overlay District under § 350-41E, and must refuse to issue one if the proposed development doesn't meet the section's minimum standards for floodplain construction.

What is the fine for building in a McLean County floodplain without a permit?

Section 350-41M sets a fine of not less than $50 nor more than $750 for each offense, with every day a violation continues counted as a separate offense, on top of a notice of violation the County records against the property's title.

Can unpermitted floodplain work affect flood insurance in McLean County?

Yes. Under § 350-41M(2), the State's Attorney must inform the owner that a willful floodplain violation is treated as an act that increases flood damages, which can cause the parcel's standard flood insurance policy coverage to be suspended.

Sources & Official References

[1]McLean County Code § 350-41, FP Floodplain Overlay District

Other rules in McLean County

Noise Ordinances: Quiet HoursSome Restrictions Fence Regulations: Height LimitsSome Restrictions Parking Rules: RV & Boat ParkingSome Restrictions Flood Elevation RequirementsSignificant Restrictions Boat Dock PermitsSome Restrictions Erosion ControlSome Restrictions Stormwater ManagementSome Restrictions Parking Rules: Loading ZonesSome Restrictions Parking Rules: Driveway RulesSome Restrictions Parking Rules: Abandoned VehiclesSignificant Restrictions

All McLean County rules

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