Grass Height Limits: Downers Grove vs Naperville

How tall can my grass be in unincorporated DuPage County?

DuPage County does not set a specific inch limit at the county level. Instead, Fire Code Section 304.1.2 requires you to cut down and remove weeds, grass, and vines that are capable of being ignited and endangering property. Cities and villages within DuPage may set stricter numerical limits.

What if my property is in a city or village within DuPage?

Your municipality's grass-height ordinance applies first. The County Fire Code requirement is the floor for unincorporated areas. Check your city or village code for a specific height limit, which is often between 8 and 12 inches.

What happens if I do not cut the weeds?

The DuPage County Fire Code Official may issue a notice of violation. If you do not comply, the County may abate the hazard and bill you, with the cost becoming a lien on the property. Each continuing day may be cited as a separate offense.

How tall can grass be in Naperville before getting a ticket?

Grass and weeds may not exceed 8 inches on private property or in the right-of-way. After a notice, the city may mow and bill the owner if not corrected.

What is the No Mow til Mother's Day program?

Registered participants can let their lawns grow naturally until the Saturday after Mother's Day to support pollinators. A participation sign must be displayed. Registration exempts them from the grass height ordinance during that period.