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St. Charles County, MO Sign Regulations: Garage Sale Signs (2026)

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

Key Facts

Max sign size
4 square feet
Signs allowed
One per residence
Early posting
1 day before sale max
Removal deadline
Within 24 hours after sale
Responsible party
Person conducting the sale

Summary

St. Charles County limits garage sale signs to one 4-square-foot sign per residence, posted no more than a day early and removed within 24 hours after the sale ends.

These county ordinances apply to unincorporated areas of St. Charles County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

On-premise signs advertising general sales of personal property operated by private individuals: a. No sign shall be exhibited for more than one (1) day prior to the day such sale is to commence. Signs must be removed within twenty-four (24) hours of the close of such sale. The person(s) responsible for conducting such sale shall be responsible for removing such signs. b. One (1) sign not more than four (4) square feet shall be permitted to be displayed on the property of the residence where the sale is being conducted.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4863880; v61 updated 2026-05-11; through 05-11-2026).

Full Breakdown

Under UDO Section 405.480(C)(3), a homeowner running a garage or yard sale may post one on-premise sign advertising the sale, but it can't exceed four square feet and can't go up more than one day before the sale starts. The person running the sale is on the hook for taking the sign down; it has to come down within 24 hours after the sale closes. The rule sits under the county's list of signs not requiring permits, so no permit application is needed, but the size and timing limits are enforced by the Division of Planning and Zoning like any other zoning sign standard.

Violations & Fines

Violating the size or timing limits is a zoning code violation enforced by the Division of Planning and Zoning; the county can order the sign removed and cite the resident conducting the sale.

Frequently Asked Questions

Can I put up my garage sale sign early?
Only one day before the sale starts. Section 405.480(C)(3) bars putting it up any earlier, and it must come down within 24 hours after the sale ends.
How big can a St. Charles County garage sale sign be?
No more than four square feet, and only one sign is allowed, displayed on the property where the sale is being held.

Sources & Official References

Other rules in St. Charles County

Fence Regulations: Height LimitsSome RestrictionsPolitical SignsSome RestrictionsDigital BillboardsSignificant RestrictionsHoliday DisplaysFew RestrictionsWindow SignsSome RestrictionsFence Regulations: Retaining WallsSome RestrictionsFence Regulations: Material RestrictionsSome RestrictionsAnimal Ordinances: Veterinary Clinic ZoningSome RestrictionsAnimal Ordinances: Pet Store RulesSome RestrictionsAnimal Ordinances: Mandatory Spay/NeuterSome Restrictions

All St. Charles County rules

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