welcome to THE CITY OF LAKE SAINT LOUIS online portal 

Lake Saint Louis Licensing, Permitting and Code Enforcement all from your computer or mobile device.

Online services are available 24 hours a day, 7 days a week.

Important Login Information:

  • The user accounts for different jurisdictions using Citizenserve are not interconnected. Therefore, if you have an account with a different jurisdiction in the county that does not mean you have an active account on this site. 
  • If you are a first time user please proceed to the Login Page and click on "Register Now".
  • If you are a returning user please proceed to the Login Page. If you forgot your username click on "Forgot Your Username". Once you recover your username you will need to do the same for your password. 

Building Permits 

Apply for building permits and rental occupancy permits, check the review status of permit applications, and schedule inspections.

Public Works

Apply for public work permits, check the review status of permit applications, and schedule inspections.

Planning and Zoning Applications

Apply for planning and zoning applications, check the review status of applications, schedule a preapplication meeting.

Code Enforcement Concerns

Have you noticed Municipal Code violations in your neighborhood? If so, you may submit a concern online.  City staff will investigate the information you provide and take the appropriate actions.


Conducting business in Lake Saint Louis? Need to renew an existing business license or apply for a new business license? Need a contractor’s business license? Need a peddler/solicitor license? Having a Special Event? Learn when a license is required, submittal requirements, apply online, pay license fees, and view status of your license application.