Environmental Rules in Kane County, IL (2026)
4 county-level rules, plus city-specific rules for 2 cities in Kane County, Illinois.
Verified from official government sources
Stormwater Management
Unincorporated Kane County requires a stormwater management permit before any development disturbs more than five thousand square feet of ground or two hundred fifty cubic yards of material, sits in the floodplain, or affects a wetland. Larger sites face detention storage and best-management-practice requirements sized to the new impervious area created.
Kane County Stormwater Management Permit Rules
Some RestrictionsKane County Code § 9-28(A)
A stormwater management permit is required if: 1. The development is located in the regulatory floodplain; ... 6. The development disturbs more than five thousand (5,000) square feet of ground or two hundred fifty (250) cubic yards of material (earth, soil, clay, gravel, grindings, etc.), unless the development consists solely of: a. The installation, renovation or replacement of a septic syste...
Erosion Control
Every construction site in unincorporated Kane County must keep disturbed ground below forty acres at any one time, cap it at eighty acres only to balance cut and fill, and route all runoff through sediment traps or basins before it leaves the property under the county's erosion and sediment control rules.
Kane County Erosion Control Disturbance Limits
Some RestrictionsKane County Code § 9-59(G)
The area of disturbance on-site at any one time shall be limited to forty (40) acres. An additional forty (40) acres (a maximum of 80 acres of disturbance at any one time) may be disturbed if necessary to balance cut and fill on-site. The Administrator may approve a larger area of disturbance pursuant to a plan for phased construction or after development has begun, if the developer adequately ...
Flood Zones
Any development inside the FEMA-mapped regulatory floodplain of unincorporated Kane County falls under the county's stormwater management ordinance. The base flood elevation is fixed from the current Flood Insurance Study, and any part of a site sitting inside the regulatory floodway above that elevation is held to the tougher floodway standards until FEMA issues a map revision.
Kane County Floodplain Development Standards
Significant RestrictionsKane County Code § 9-136(A)
The BFE shall be delineated on the site topography to establish the regulatory floodplain area limits for regulation under this chapter. Regulatory floodplains shall be delineated on the site map from the current FEMA FIRM, FIS or LOMR and include those areas of the SFHA which are not regulatory floodplains. The current version of the maps adopted and published by FEMA for regulation under the ...
Flood Elevation Requirements
In unincorporated Kane County, any building in the regulatory floodplain must be elevated or floodproofed to the Flood Protection Elevation (FPE): base flood elevation (BFE) plus a freeboard cushion. Along the Fox River floodplain that cushion runs up to 3 feet above BFE; in other mapped floodplains it is 2 feet, enforced under Code Sec. 9-139.
Kane County Floodplain Elevation Standards
Significant RestrictionsKane County Code Sec. 9-139
9-139: BUILDING PROTECTION STANDARDS: This section applies to all buildings located in the regulatory floodplain. However, most new and replacement buildings are not appropriate uses of the regulatory floodway. A summary of the building protection standards is provided in tables 9-139.A and 9-139.B of this section... Notes: 2. An addition to an existing industrial building may be constructed at...
Environmental Rules by City in Kane County
2 cities in Kane County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
All Kane County ordinances
See every category we cover for Kane County: parking, noise, fences, fires, animals, pools, and more.
Kane County Ordinance Hub →