Private Investigator / Detective Agency Business

Overview, preparation and instructions to apply for a Private Investigator / Detective Agency Business License


Your business requires a Graduated Business License (GBL). Use the links below to download a GBL application and/or access  information about the GBL. 

(Graduated Business License Information and Fee Schedule), (Graduated Business License Application)


If you are not sure if your business requires a Graduated Business License (GBL), please click the link "Business License Information", where you will find more information about licensing and a list of business types.  Once you are there, click on the business type that describes the type of business you plan to do in the City of St. Louis.

If you still have questions about your business type, please contact our office at 314-622-4528 to find out the appropriate steps that you will need to follow to obtain a business license for the City of St. Louis.


Step 1

Before visiting City Hall to acquire your Graduated Business License you must, obtain a Police Record check from the City or St. Louis County.  The recods check can be completed here:

     Public Service Center
     Records Division
     St. Louis Police Department
     1200 Clark St., Room 114
     St. Louis, MO 63103
     (314) 444-5589

There will be a charge for the record check.  Cash or money order only.  The charge is $9.00 and there is a three day waiting period.  You will need to provide a valid photo, proof of birthdate, social security number, and type of business you need a record check for.

Step 2

Visit the License Collector’s office in Room 104 of City Hall.  For your convenience, you may fill out the Graduated Business License form in advance.  You can download it here.

Step 3

In addition to visiting the License Collector’s office, you will also need to obtain a clearance from the Collector of Revenue’s office at the location below:

    City Hall Room 410
    1200 Market St.
    St. Louis, MO 63103
    (314) 622-3291

        St. Louis City Ordinance 63454
        St. Louis City Revised Code Chapter 8.02.010 - Statement of Clearance - Required

Step 4

If your business is located in the City of St. Louis, you must also obtain an Occupancy Permit from the Building Division at the location below:

    Building Division
    Department of Public Safety
    City Hall Room 425
    1200 Market St.
    St. Louis, MO 63103
    (314) 622-3313

Step 5

Finally, you must provide the following information: 

     a.  Experience Requirements, including Military Police, police experience or secret service.

  Five references for each person including the owner and board of directors.  The references must have known the person applying for license at least five years.

This information will be forwarded to the St. Louis Metropolitan Police Department and must be approved before a license can be issued.

What to Expect

Once all clearances and payments are received, you will be able to obtain your license to do business in the City of St. Louis.

Additional Information

If you pay by check, the license application may be held for several working days until the check clears.

A separate Graduated Business License is required for each business location or trade name.

       St. Louis City Ordinance 52030
       St. Louis City Revised Code Chapter 8.02.040

Please visit our general information page to get more important information that you will need to know before obtaining your business license.  You can get there by clicking the link:  "Business License Information".

For more information about the License Collector's Office other resources and services, please visit our office home page by clicking on the link "License Collector" below.  Once you are there, you will find a list of links to the various other resources and services provided by our office.  Those links can be found to the right of the home page under the section titled "Related information".

Link:  License Collector



Office of the License Collector

(314) 622-4528

1200 Market Street, City Hall, Room 102-104
St. Louis, MO 63103

Monday - Friday 8:00am - 5:00pm

Contact the Office of the License Collector

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