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Naperville, IL Noise Ordinances: Decibel Limits (2026)

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

Key Facts

Residential limit
55 dBA day, 50 dBA night
Commercial limit
62 dBA day, 55 dBA night
Industrial limit
80 dBA day and night
Measurement point
property line of noise source

Summary

Naperville caps exterior noise at the property line by zoning district and time of day, from 50 dBA in residential areas at night to 80 dBA in industrial zones, under Municipal Code § 6-14-4.

The decibels generated from a use shall not exceed the exterior noise limitations set forth in table 1 of this Section as measured at the property line of the parcel from which the noise is generated. ... TABLE 1: Residential 55 dBA (7:00 a.m. to 7:00 p.m.) / 50 dBA (7:00 p.m. to 7:00 a.m.); Commercial 62 dBA / 55 dBA; Light industrial 70 dBA / 70 dBA; Industrial 80 dBA / 80 dBA.

Source: Naperville Municipal Code, Title 6 (American Legal Publishing)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

Naperville's performance standards set maximum exterior decibel levels measured at the property line of the parcel generating the noise. Residential uses are capped at 55 dBA from 7:00 a.m. to 7:00 p.m. and 50 dBA overnight; commercial uses at 62/55 dBA; light industrial at a flat 70 dBA; and industrial uses at a flat 80 dBA around the clock. Sound must be measured with an ANSI S1.4-compliant sound level meter and octave band analyzer. Daytime construction and landscaping noise, permitted amplified sound, church bells, and emergency equipment are exempt from the table.

Violations & Fines

Any use exceeding the Table 1 limits violates § 6-14-4 and is subject to the Municipal Code's general penalty provisions; the City may investigate compliance with performance standards at any time.

Frequently Asked Questions

What is the daytime noise limit for a Naperville residential property?
55 dBA measured at the property line between 7:00 a.m. and 7:00 p.m., dropping to 50 dBA overnight, under Naperville Municipal Code § 6-14-4, Table 1.
Does daytime construction noise count toward the decibel limit?
No: daytime construction and landscape maintenance noise between 7:00 a.m. and 7:00 p.m. is exempt from the Table 1 limits under § 6-14-4.1.2.2.

Sources & Official References

Other rules in Naperville

Quiet HoursSome RestrictionsConstruction HoursSome RestrictionsAmplified Music & Outdoor SoundSome RestrictionsLeaf Blower RulesLight RestrictionsBarking DogsSome RestrictionsParking Rules: Towing & Impound RightsSignificant RestrictionsParking Rules: Preferential Parking DistrictsSome RestrictionsParking Rules: EV ChargingSome RestrictionsFence Regulations: Fence Permit RequirementsSome RestrictionsAnimal Ordinances: Bird ProtectionSome RestrictionsFire Regulations: Outdoor BurningHeavy Restrictions

All Naperville rules

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