Skip to main content
CityRuleLookup
Key FactsOrdinance TextFull BreakdownViolationsFAQSourcesMore in O'Fallon

O'Fallon, MO Home Business: Signage Rules (2026)

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

Key Facts

Governing section
O'Fallon Code § 410-120(A)(18)
Size limit
2 square feet, one sign per lot
Permit
No permit required for the exempt sign
Cross-reference
§ 400-280(D)(7) requires conformance with sign code

Summary

O'Fallon caps home occupation signage at one sign per lot, under two square feet in area, per Section 410.120(A)(18) of the sign code, and lets residents put it up without a permit as long as the underlying business is a lawful home occupation.

Home Occupations. Any property owner operating a permitted home occupation or other commercial use permitted in a residentially zoned area (unless otherwise noted), may have one (1) sign, not to exceed two (2) square feet in area, per lot. These signs may be placed without a permit.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4860992; v58 updated 2026-05-14; through 05-14-2026).

Full Breakdown

The City's sign code, not the home based business chapter, sets the actual size limit for a home occupation sign. 280(D)(7) of the zoning code tells a home based business owner only that any sign must conform to 'the sign standards of the City of O'Fallon,' pointing operators to Chapter 410. 120(A) still requires that any exempt sign 'comply with all applicable codes and ordinances in regard to design, illumination, placement, construction and maintenance' and not be displayed in a way that would otherwise be prohibited.

In practice this means one small identification sign, not exceeding two square feet, is the entire signage allowance for an O'Fallon home based business: there is no path in the code to a larger or illuminated sign, and any additional or oversized signage requires a permit and review under the general sign standards rather than the home occupation exemption.

Violations & Fines

A home business sign larger than two square feet, more than one per lot, or displayed in a manner otherwise prohibited by the sign code falls outside the Section 410.120(A)(18) exemption and requires a standard sign permit and review under Article III of Chapter 410; installing it without that permit is a code violation enforceable the same as any unpermitted sign.

Frequently Asked Questions

How big can my home business sign be in O'Fallon?
Section 410.120(A)(18) limits a home occupation to one sign, no larger than two square feet, per lot. It can be placed without a sign permit, but a larger or additional sign falls outside this exemption and needs a standard permit under Chapter 410.
Do I need a permit for my home business sign?
No. Section 410.120(A)(18) classifies the single two-square-foot home occupation sign as an exempt sign that 'may be placed without a permit.' It still has to meet the sign code's design, illumination, and placement rules, and it does not authorize any second or larger sign.
Can I put up a bigger sign if my home business grows?
Not under the home occupation exemption. Anything beyond one sign of two square feet requires a standard sign permit reviewed under Article III of Chapter 410, and it must meet that article's size and design standards rather than the exempt-sign provision in Section 410.120(A)(18).

Sources & Official References

Other rules in O'Fallon

Noise Ordinances: Construction HoursSome RestrictionsFence Regulations: Height LimitsSome RestrictionsZoning & Home Occupation PermitsSome RestrictionsCustomer Traffic RestrictionsSome RestrictionsHome DaycareSignificant RestrictionsFence Regulations: Material RestrictionsSignificant RestrictionsFence Regulations: Fence Permit RequirementsSome RestrictionsAnimal Ordinances: Pet Groomer RulesSome RestrictionsFire Regulations: Propane StorageSome Restrictions

All O'Fallon rules

Compare O'Fallon to another location·View the Missouri home business overview

Get notified when Signage Rules in O'Fallon, MO 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.