St. Charles County, MO Home Business: Zoning & Home Occupation Permits (2026)
Key Facts
- Max floor area used
- 25% or 500 sq ft, whichever less
- Max customers at once
- 2 (10 for photo studios)
- Who may operate it
- Household members only
- Separate entrance
- Not allowed
Summary
St. Charles County lets residents run one home occupation per household in any residential zoning district, but caps it at 25% of the home's floor area, 500 square feet, and two customers at a time.
Only one (1) occupation or profession shall be permitted per resident residing at the premises. No more than two (2) customers or clients may be served in a residence at one (1) time, except in the case of photography studios, where the number of customers shall not exceed ten (10). The occupational use may occupy not more than twenty-five percent (25%) of the total floor area of the primary residential structure, and in no case more than five hundred (500) square feet of total floor area combined in all structures on the property.
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 the Unified Development Ordinance's home occupation article, only one occupation or profession is allowed per resident, and it must be run by household members living on site. The business can't exceed 25% of the primary residence's floor area or 500 total square feet across all structures, and only two customers or clients may be on the property at once (up to ten for photography studios). No separate exterior entrance, outdoor storage, or structural changes that alter the residential look are allowed, and only normal domestic equipment may be used: no industrial or commercial machinery. Residential properties meeting these standards get a zoning confirmation for occupancy.
Violations & Fines
The Building Division reviews zoning confirmations for occupancy permits; a home occupation that exceeds the floor-area cap, adds a separate customer entrance, or uses commercial/industrial equipment fails the confirmation and can be ordered to stop operating or scale back to comply.
Frequently Asked Questions
Can I run more than one home business from my St. Charles County house?
Can I hire outside employees for my home business?
Sources & Official References
Other rules in St. Charles County
How St. Charles County compares: Easiest Cities to Run a Home Business·Compare St. Charles County to another location·View the Missouri home business overview
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