Environmental Rules in Will County, IL (2026)
5 county-level rules, plus city-specific rules for 1 city in Will County, Illinois.
Verified from official government sources
Stormwater Management
Will County requires a stormwater management permit before any development that could raise flood elevations or shift drainage costs onto neighbors, with detention required for most subdivisions and multi-family or nonresidential sites.
Will County Stormwater Detention and Permit Rules
Some RestrictionsWill County Code § 55.021
(A) Requirements applicable to all developments. No development shall: (1) Result in any new or additional expense to any person other than the developer for flood protection; or (2) Increase flood elevations or decrease flood conveyance capacity upstream or downstream of the area under the ownership or control of the developer.
Erosion Control
Will County requires construction sites to route all disturbed-area runoff through sediment control facilities before it leaves the site, with a written erosion control plan mandatory before grading starts.
Will County Erosion & Sediment Control Rules
Some RestrictionsWill County Code § 55.037
The runoff from disturbed areas shall not leave the development site without first passing through sediment control facilities. This requirement shall apply to all phases of construction and shall include an ongoing process of implementation of measures and maintenance of those measures during both the construction season and any construction shut down periods.
Flood Zones
New and substantially improved homes in unincorporated Will County's regulatory floodplain must have their lowest floor built up to the flood protection elevation, two feet above the base flood elevation.
Will County floodplain building rules
Some RestrictionsWill County Code § 164.062(C)(1); § 164.999(A)
The lowest floor including basements of all new residential structures, substantially improved structures and additions shall be elevated up to at least the flood protection elevation. ... Any person found guilty of an offense under this chapter shall pay a civil fine in an amount not less than $25 and not more than $1,000. Each calendar day during which the violation continues to exist shall c...
Boat Dock Permits
In unincorporated Will County, boat docks, boathouses and piers are allowed within required wetland and stream buffer areas, but they must meet the buffer-width standards of the county's Water Resource Ordinance.
Will County Boat Dock Rules in Stream Buffers
Some RestrictionsWill County Code § 164.067(D)(9)(c)
(9) All buffer areas shall be maintained free from development including disturbance of the soil, dumping or filling, erection of structures and placement of impervious surfaces except as follows... (c) Boat docks, boathouses and piers shall be allowed and the provisions of division (D)(1) above shall apply.
Flood Elevation Requirements
Will County requires new and substantially improved residential structures in the regulatory floodplain to elevate their lowest floor to the Flood Protection Elevation, the base flood elevation plus one foot of freeboard, under the county Stormwater Management Ordinance.
Will County: 1-Foot Freeboard Above BFE
Some RestrictionsWill County Code § 55.062(C)(1)
The lowest floor including basements of all new residential structures, substantially improved structures and additions shall be elevated up to at least the FPE. An attached garage for a structure must be elevated up to at least 0.1 feet above the BFE. (a) If placed on fill, the top of the fill for the residential structure shall be above the FPE. The top of fill for an attached gara...
Environmental Rules by City in Will County
1 cities in Will County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
All Will County ordinances
See every category we cover for Will County: parking, noise, fences, fires, animals, pools, and more.
Will County Ordinance Hub →