St. Charles County, MO Building Safety: Childcare Center Rules (2026)

1 of the Building Code adopted at St. 100, classifies the occupancy of every structure in the unincorporated county, including in-home day cares. 3, in the Building Code's Educational Group E chapter, carves out a specific exception for small operations: a facility within a dwelling unit caring for eight or fewer children is classified as a Group R-3 occupancy, or may simply comply with the International Residential Code instead. That means a provider caring for eight or fewer children in their own house is treated like any other single-family home for fire separation, egress and construction-standard purposes, rather than being forced to meet the sprinkler, corridor and occupant-load rules that apply to a standalone Group E school or larger day care building.

Once enrollment exceeds eight children, the operation no longer qualifies for the R-3 exception and the building must be brought up to full Educational Group E standards under the same Building Code. 5, on a form obtained from the Building Official, for a $100 application fee. 4, punishable by a fine of up to $500, with each additional day counted as a separate offense.