The Wentzville Fire Protection District issues permits for building construction, commercial use (occupancy), open burning, and commercial fireworks. The private use of recreational fireworks may be prohibited by certain city ordinances (please check with your municipality). We strongly discourage the use of fireworks due to their dangerous nature.

When permits are required?


Construction/Operational Permits

Application for Permit (click here)

All Commercial or Multi-Family must be permitted. Completed building permit applications must be submitted with an electronic version to [email protected].  All plans must be sealed.  The applicant will be notified when permits are approved.  CASH, CHECK or CREDIT CARD (2.5% credit card fee will be applied to balance) accepted.  No work may begin prior to permit issuance.  All inspections must be scheduled 24 hours in advance through district headquarters at 636-332-9869.  Inspections will not be scheduled by the Fire Marshal or Fire Inspector in the field or via their cell phones. Call the office to schedule any inspections with an  Administrative Assistant.

If a Knox Box is required on your building, use 4400 series at approximately 5′ high.   When choosing a fire department for the purchase of a Knox Box, unless specified by Fire Marshal, Wentzville FPD is the default department.  If returned plans specify mutual aid, then, choose St CharlesCo Fire Prot Assn/Emerg Svd.

Occupancy Permits

Application for Occupancy Permit (click here)

Occupancy permits are required by the Wentzville Fire Protection District for owner or tenants to occupy or re-occupy existing commercial spaces or to occupy newly constructed space. Click here for the attached document for items that will be reviewed upon occupancy.  The City or the County may also require an occupancy permit to be issued as well. The application is not a permit itself.   Emergency Contacts may be updated by emailing information to [email protected].

All questions regarding permits and the Fire Prevention Bureau may be directed to Chris Cuddihee, Fire Marshal at 636-332-9869 between 8:00 a.m. and 4:00 p.m. Monday through Friday or by email at: [email protected]

Application for Variance


Frequently Asked Questions:

What are the current codes being enforced?
2021 ICC Building Code with amendments
2021 ICC Fire Prevention Code with amendments

There are amendments to the above codes, as well as local Ordinances dealing with fire hydrants, hazardous materials, street sizes and other fire related codes which are available by contacting us.

How many plans are required to be submitted along with application?

All plans can be submitted via email to [email protected]

  • Commercial -1 set electronically
  • Multi-Family-1 set and a plot plan electronically.

Are they required to be signed or sealed and by whom?
Commercial Plans & Sprinkler Plans, must be signed and sealed by a Missouri Registered Design Professional (a Registered Architect or Professional Engineer).

Are numbers required on residential homes?
Yes… shall have the number so displayed on the dwelling in a position easily observed and readable from the public right-of-way. All numbers shall be in Arabic figures at least four (4) inches high and one half (1/2) inch wide stroke. All such numbers shall be contrasting color to the background to which they are mounted.