Skip to main content
CityRuleLookup
Key FactsOrdinance TextFull BreakdownViolationsFAQSourcesMore in Naperville

Naperville, IL Environmental Rules: Erosion Control (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Governing section
City Code § 5-2B-7
Plan preparer
Illinois-registered professional engineer
Minimum yard slope
1.5% side and rear drainage
Trigger
New home or addition permit

Summary

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.

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.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 101).

Full Breakdown

Before the City issues a building permit for a new home or an addition, Section 5-2B-7 requires a detailed grading plan for any lot within a subdivision that lacks a master grading plan. A professional engineer registered in Illinois must sign and seal the plan, which must show existing topography, the topography within 50 feet of the lot, and proposed grades for the foundation, adjacent ground, pavement, and all high, low, and break points. Side and rear yards need a minimum 1.5% drainage slope; where that slope can't be met, the plan must add drainage inlets connected to a public storm sewer or a sized dry well.

Violations & Fines

Building without an approved, engineer-sealed grading plan can block issuance of the building or occupancy permit, and non-conforming grading discovered later must be corrected at the owner's expense.

Frequently Asked Questions

Does Naperville require a grading plan before building?
Yes. City Code § 5-2B-7 requires a sealed, engineer-prepared grading plan before a building permit issues, unless the lot already sits under an approved subdivision master grading plan.
What drainage slope does Naperville require in yards?
Side yards need a swale sloped at least 1.5%, and rear yards need a design drainage pattern with at least a 1.5% slope, per § 5-2B-7.

Sources & Official References

Other rules in Naperville

Flood ZonesSome RestrictionsStormwater ManagementSome RestrictionsNoise Ordinances: Barking DogsSome RestrictionsParking Rules: Towing & Impound RightsSignificant RestrictionsParking Rules: Preferential Parking DistrictsSome RestrictionsParking Rules: EV ChargingSome RestrictionsFence Regulations: Fence Permit RequirementsSome RestrictionsAnimal Ordinances: Bird ProtectionSome Restrictions

All Naperville rules

Compare Naperville to another location·View the Illinois environmental rules overview

Get notified when Erosion Control in Naperville, IL changes

We'll email you the moment we detect a change in the code. No spam, unsubscribe anytime.

We'll never sell or share your email. One-click unsubscribe in every email.

See something wrong?

Help us keep this page accurate. If you notice an error or outdated information, let us know.