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Start Your Business in Wentzville

Thank you for choosing the City of Wentzville for your business! The mission of the City of Wentzville’s Economic Development Office is to enhance the economic vitality of Wentzville and maintain its outstanding quality of place. This is accomplished through the retention and expansion of existing businesses and by attracting new businesses like yours to the community. We are here to help you at any step along the way!

Use the drop-down menu below to view the City’s “Starting Your Business in Wentzville” checklist. To access a PDF of the checklist, please click here. For a list of important numbers, see below or click here. If you have questions, please contact the Economic Development Office by calling (636) 327-5101 or emailing

Step #1: Setting up your Business

Incorporate your business.
Obtain an Employer Identification Number (EIN).
  • Obtain an EIN at
  • All employers who have employees must be assigned an EIN from the United States Internal Revenue Service (Form SS-4).
Obtain State of Missouri Sales Tax ID.
Obtain a signed and approved copy of your lease.

Step #2: Making contact with the City

Confirm your business use is allowed in the property’s zoning district
  •  Community Development, (636) 327-5101, option 1.
  • If a Conditional Use Permit or Variance is required for zoning, you will need to go through the Planning and Zoning Division and/or the Board of Adjustment.
Establish contact with the Economic Development Office.

Contact the Economic Development Office (636) 327-5101.

Review the Community Development guidelines.

Community Development Guides

Determine if a permit is required

Prior to any work, determine if a permit is required for your tenant finish or any other construction involved by contacting the Planning and Zoning Division.

Maintain consistent contact with the Planning and Inspection divisions throughout the entire process of starting your business.
Determine any signage you will need.

Apply and obtain sign permits before completing any prep work or sign placement.

Remember, all new development must go through Community Development/Planning and Zoning.

Step #3: Completing All The Necessary Applications

Complete the City’s Business License Application.

The City has an integrated application for Inspections, Water/Wastewater Service and your Business License.

If your business involves food

Contact St.Charles County Department of Health if your business will involve food prep and/or food service.

For businesses will be selling packaged liquor or liquor by the drink.

If your businesses will be selling packaged liquor or liquor by the drink, you must obtain the following three permits:

A State Liquor License (District III Counties Served: Jefferson, Lincoln, St. Charles, St. Louis County and the City of St. Louis)

Other Licensing

Additional Licensing may be required by the City. Contact the Economic Development Office for information on the following licenses:

    • Tattoo — facility and individual
    • Payday Loan
    • Adult Entertainment
    • Pawn Broker
    • Massage Therapy — facility and individual

Step #4: Setting Up Your Services

Apply for gas service.
Apply for electric service.
Apply for telephone/communications service.
Choose a solid waste service provider.
Apply for mail service with the United States Postal Service USPS.

This will be a part of your application for your Inspections and Business License (see Step 3)