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Aurora, IL Environmental Rules: Flood Zones (2026)

Some Restrictions

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

FEMA flood zone rules in Aurora, 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 chapter: Chapter 18, cross-referenced by Building Code
Controlling rule: Most restrictive requirement applies
Stormwater review: Kane County Stormwater Ordinance, city-run
Old floodway articles: Repealed 2001, Ord. O01-67

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 Aurora, 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 Aurora, IL on the FEMA flood map

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

Summary

Aurora ties flood-hazard construction directly to Chapter 18 of the municipal code, and its Building and Residential Codes require the most restrictive of the local floodplain rules and adopted local floodway maps to control.

1612.3 is amended to read: The City of Aurora flood hazard areas shall be based on the floodplain regulations in Chapter 18 of the municipal code...R306.1.11 Additional Information for construction in areas prone to flooding is added to read: For buildings and structures in flood hazard areas as established on local floodway rate maps, locally adopted floodplain ordinances shall additionally apply, and the most restrictive requirements shall apply.

View official code

Full Breakdown

Aurora's amended Building and Residential Codes don't set their own elevation or floodway standards; instead they point builders to Chapter 18 and require compliance with 'locally adopted floodplain ordinances' on top of the state-adopted codes, with the most restrictive rule controlling. The city's standalone floodplain occupancy and base-flood-elevation articles (former §§ 18-89-18-102) were repealed in 2001; Chapter 18 today runs floodplain-adjacent stormwater review through the adopted Kane County Stormwater Ordinance, administered by the city engineer for any Aurora site, in any of the four counties.

Violations & Fines

Building in a mapped flood hazard area without meeting the floodplain and stormwater requirements blocks permit issuance and can void plan approval under the Building Code's flood-hazard provisions.

Frequently Asked Questions

Does Aurora have its own floodway construction rules?

Its standalone floodplain occupancy and elevation articles were repealed in 2001; flood-hazard construction now runs through the adopted Kane County Stormwater Ordinance and the Building Code's flood-hazard cross-reference.

What happens if state and local flood rules conflict?

The Residential Code says the most restrictive requirement controls, whether that's the local floodplain ordinance or the state-adopted building code.

Sources & Official References

[1]Aurora, IL Code of Ordinances — Ch. 12, Building & Residential Code §§ 12-17.1, 12-17.6

Other rules in Aurora

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All Aurora rules

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