Environmental Rules in Naperville, IL (2026)
3 verified environmental rules for Naperville, Illinois, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Naperville requires storm water systems to follow the City's Design Manual for Public Improvements and bars grading, earthmoving, or new storm water structures on covered property except as shown on approved final engineering plans.
Naperville Storm Water Drainage Rules
Some RestrictionsNaperville Municipal Code § 5-7-2
It shall be unlawful for any person to construct or improve any structure, to grade or do any earthmoving, to construct or improve any bypass channel or storm water storage area, or to install any control structure, on any property subject to this Chapter or on any property for which final engineering plans have been approved pursuant to this Chapter, except as provided for in such final engine...
Erosion Control
Naperville requires a detailed, engineer-sealed grading plan before issuing a building permit for a new home or addition on any lot without an approved master grading plan.
Naperville Lot Grading & Drainage Permit
Some RestrictionsNaperville Municipal Code § 5-2B-7
A detailed grading plan shall be submitted to the City for any lot within a subdivision without a master grading plan prior to the issuance of a building permit for a new home or addition. The detailed grading plan shall be signed and sealed by a professional engineer registered to practice in the State of Illinois.
Flood Zones
Naperville doesn't write its own floodplain code - City Code § 5-6-1 adopts the DuPage Countywide Stormwater and Floodplain Ordinance by reference for the city's DuPage County area, with a separate Will County ordinance covering the rest.
Naperville Flood Plain Development Rules
Some RestrictionsNaperville Municipal Code § 5-6-1
The flood plain regulations for development in special flood hazard areas in the DuPage County portion of the City as contained in the DuPage Countywide Stormwater and Floodplain Ordinance, effective May 14, 2019, as amended from time to time, are hereby adopted by reference. One (1) copy of said regulations, effective August 1, 2019, shall be kept on file for public inspection in the office of...
Looking for DuPage County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Naperville city rules.
Environmental Rules in DuPage County →