St. Charles County requires land use permits in order to:
construct, alter, or repair of any building or structure; and/or
re-grade any area less than 5,000 square feet other than for agricultural purposes.
Exceptions include non-floodplain electrical permits and non-floodplain septic repair permits.
Applications for building permits also serve as a land use permit application. Consequently, a separate land use permit application should be completed only when a building permit is not required.