Missouri
Updated 3/15/2025
Overview
In Missouri, building codes are adopted and enforced at the local level, meaning there is no
statewide mandatory code enforcement. Each jurisdiction has the authority to adopt and
amend codes as needed. While some cities, such as St. Louis, have adopted specific codes
like the 2017 National Electrical Code (NEC), other areas may enforce different versions or
additional requirements.
CodePro Uses the Following Codes for Answers:
- 2015 International Residential Code (IRC)
- 2015 International Plumbing Code (IPC)
- 2017 National Electrical Code (NEC) (Adopted in St. Louis)
Additional Resources:
For more information, click here for the state-specific website. Local jurisdictions
determine which building codes to adopt and enforce, and amendments vary by city or
county. It’s recommended to consult the building department or official website of the
specific Missouri jurisdiction in question.
- Adoption Category
Local
- Amendments
Local
Local Adoption
A local adoption model means that the state does not mandate uniform building codes,
leaving code adoption and enforcement entirely to local jurisdictions. Cities and counties
determine which codes to implement, leading to potential variations in regulations across
different areas within the state.