Building and Permits

On September 9, 2016, the City of O'Fallon adopted the 2015 codes listed below. The City will begin requiring all construction documents be designed to these codes starting December 9, 2016. Until that date, project applications may be submitted designed to the 2009 codes or the 2015 codes (as an approved alternative).

  • 2015 International Building Code
  • 2015 International Residential Code
  • 2015 International Existing Building Code
  • 2015 International Fire Code
  • 2015 International Mechanical Code
  • 2015 International Fuel Gas Code
  • 2015 International Plumbing Code
  • 2015 International Energy Conservation Code
  • 2015 International Property Maintenance Code
  • 2015 International Swimming Pool and Spa Code
  • 2014 National Electric Code

Amendments to the codes can be viewed at the following link: 2015 Code Adoption (PDF). Downloadable PDFs of the newly-adopted code are listed below.

The Building Division performs plan review and inspections on new residential and commercial properties. Residential permits are required for any new home, as well as for decks, sheds, pools, basement finishes, additions and major alterations. Residential rental occupancy permits are required before occupying the unit. Commercial permits are required for any new commercial project including alterations or additions. This division is also responsible for the planning and implementation of the City’s adopted building codes and ordinances.

Questions about re-roofing your home? Check out our brochure: Residential Re-Roofing Requirements (PDF)

Apply for a permit     Account Login

The division is located on the second floor of O'Fallon Municipal Centre (City Hall). Hours of operation are Monday through Friday, 8 a.m. – 5 p.m.

Scheduling an inspection can be completed by logging into the O’Fallon Permitting, Licensing, and Enforcement (OPLE) portal using the button above. Inspections scheduled using the portal are typically completed the next day. Rental occupancy inspections may require two (2) day’s notice prior to an inspection being conducted depending on when the request is received. Questions may be directed to 636-379-5660.


Current Codes and Adoptive Ordinances (PDF files) (Until December 9, 2016; see below.)

Newly-adopted Codes and Adoptive Ordinances (PDF files)

Other resources (PDF files)

Fire Districts

Please note:  The City of O'Fallon is served by multiple independent fire districts that are separate governmental entities and do not fall under the authority of the City of O'Fallon. These districts may require their own building permit. Please contact the appropriate district for more information. The districts are:

Click here to view a map of the districts. 


Contact Building staff

If you have any questions or concerns, please contact the Building Division's main telephone line at 636-379-5660. You may also contact the employees below directly:

Nathan Lacey, Building Official This email address is being protected from spambots. You need JavaScript enabled to view it. 636-379-5597
Debbie Cammann, Administrative Assistant This email address is being protected from spambots. You need JavaScript enabled to view it. 636-379-5599
Cortney Hallemeier, Building Permit Technician This email address is being protected from spambots. You need JavaScript enabled to view it. 636-379-5495
Randy Garner, Commercial Building Inspector This email address is being protected from spambots. You need JavaScript enabled to view it. 636-379-5402
Scott Dabney, Residential Building Inspector This email address is being protected from spambots. You need JavaScript enabled to view it. 636-379-5564
Chris Gaw, Residential Building Inspector This email address is being protected from spambots. You need JavaScript enabled to view it. 636-379-5432
Nick Beelek, Residential Building Inspector This email address is being protected from spambots. You need JavaScript enabled to view it. 636-379-5594

City of O'Fallon Fee Schedule