O'Fallon, MO 63366
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Building and Permits
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.
Apply for a permitAccount Login
The division is located on the second floor of O'Fallon Municipal Centre (City Hall), 100 North Main Street.
Scheduling an inspection can be completed by logging into the CitizenServe 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.
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- Do you need a permit?: Please refer to the next tab to see if your project requires a permit.
- Submittal requirements: Each permit type has different submittal requirements. Understand what you'll need to provide to get started with our guides.
- Register on our online portal: Once registered you can apply for permits, see the review status, schedule inspections and more. Register for a free account.
- Apply for a permit: Once you've gathered everything needed for your application and registered on our portal, you can apply and pay your permit application fees.
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A permit is required for projects such as new construction, additions, remodels and repairs to electrical, mechanical and plumbing systems. Projects that require a permit include:
For the following permits, call the Building Division at 636-379-5660.
- Small Projects: Fences, Decks / Porches / Sunrooms, Patio Covers / Pergolas, Sheds, Pools and Hot Tubs, Retaining Walls, Water heaters, HVAC Replacement
- Alterations / Additions: Room Additions, Basement Finishes, Solar Panels, Fire / Wind / Impact Damage, Structural Modifications, Altering, replacing or relocating systems
- New Construction / Use: New buildings, Change of Use, Garages, Alterations
- Miscellaneous Projects: Demolition
For the following permits, call the Planning Division at 636-379-5544.
- Miscellaneous Projects: Temporary Structures, Dumpsters, Signs
For the following permits, call the Engineering Department at 636-379-7630.
- New Construction / Use: Grading/Land Disturbance
- Miscellaneous Projects: Driveways
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- Temporary signs: Freestanding – Banners- Specialty display – Project identification - Annual
- Permanent signs: Wall – Freestanding – Multi-Tenant – Interchange
- Weekend directional
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- Manage your Projects
- Pay Fees
- Submit documents
- Schedule an inspection
- Review Progress
Current Codes and Adoptive Ordinances
- Access O'Fallon's ICC Codes – View and use O'Fallon's ICC Codes, with ordinance changes included, for free.
Other Resources
- City of O'Fallon Permit Fee Schedule (PDF)
- Open in the "O" brochure (PDF) – A guide to opening a business in O'Fallon
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:
- Central County Fire & Rescue
- Cottleville Fire Protection District
- Lake Saint Louis Fire Protection District
- New Melle Fire Protection District
- O'Fallon Fire Protection District
- Wentzville Fire Protection District
- View a map of the fire districts (PDF)
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. For commercial building questions, please contact Nathan Lacey. For residential building questions, please contact Scott Dabney.
| Chris Gaw, Building and Code Enforcement Manager | cgaw@ofallonmo.gov | 636-379-5432 |
| Nathan Lacey, Building Official | nlacey@ofallonmo.gov | 636-379-5597 |
| Scott Dabney, Residential Building Supervisor | sdabney@ofallonmo.gov | 636-379-5564 |
| Debbie Cammann, Administrative Assistant | dcammann@ofallonmo.gov | 636-379-5599 |
| Cortney Hallemeier, Building Permit Technician | challemeier@ofallonmo.gov | 636-379-5495 |
| Nick Funke, Commercial Building Inspector | nfunke@ofallonmo.gov | 636-379-5598 |
| Nick Beelek, Residential Building Inspector | nbeelek@ofallonmo.gov | 636-379-5594 |
| Joe Garner, Residential Building Inspector | jgarner@ofallonmo.gov | 636-379-4122 |
| Jeff Newman, Residential Building Inspector | jnewman@ofallonmo.gov | 636-379-5658 |
| Anthony Ledwon, Residential Building Inspector | aledwon@ofallonmo.gov | 636-379-5433 |
| Erin Walker, Residential Building Inspector | ewalker@ofallonmo.gov | 636-379-5491 |