• Every individual home or building on a given street should have a unique street address that fits consistently with neighboring addresses.
  • If a home or building has an external structure on the same piece of property such as an unattached garage, a storage shed, or a tool shop, the secondary structure should have its own individual address IF there is a separate phone line running from the structure, someone is living in the structure, or the secondary structure is the site of a business.
  • A telephone equipment box, cell tower, traffic signal, or billboard with telephone calling capabilities would require an individual, unique address for that structure.

Please note that these are meant as general examples and do not describe every possible addressing situation. Exceptions and special cases may exist that need to be handled differently.

Did you know? St Clair County and most municipalities have ordinances requiring your address to be marked at your residence and plainly visible from the street. Addresses should be marked on your house and on both sides of your mailbox.

 

How to Apply for a New Address in St Clair County

  • Apply Online: Click here to access the online form and follow the instructions to fill out and submit an address request application on-line.
  • Apply in Person: Stop by the St Clair County ETSB at 101 S 1st St in Belleville to fill out and submit your application.
  • Download and Print the Form: Click here to download the application. It is in PDF format and will open in Adobe Acrobat Reader. Click on the printer button located at the upper left corner of the document in the Adobe toolbar, and the print dialog box will open. Print the document, fill it out, and return it to the ETSB office.
  • Request a Form: If you would like an application form faxed or mailed to you, please contact the addressing office at 618-825-2160.


When submitting a paper application, please use the following instructions:

  • Fill out the application form completely. It is important that you include the eleven-digit parcel identification number for the property needing an address. If you do not know your parcel identification number, please contact the St Clair County Mapping and Platting Dept at 618-277-6600.
  • Along with your application form, please include a sketch of the property showing the structure for which you are requesting an address and the location where that driveway intersects with the road. Also show neighbors’ addresses or any other useful information.
  • Return your completed application and property sketch to the St Clair County ETSB either by dropping it off at our office, by sending it through US mail to 101 S 1st St, Suite A, Belleville, IL 62220, or by faxing the paperwork to 618-277-7668, Attn: Addressing.
  • Your application will be processed within fifteen working days of receipt. You will be notified by mail of your new address.

How to Get an Official Address Verification

  • Apply Online: Click here and follow the instructions to fill out and submit an address verification application on-line.
  • Apply in Person: Stop by the St Clair County ETSB at 101 S 1st St in Belleville to fill out and submit your application.
  • Download and Print the Form: Click here to download the application. It is in PDF format and will open in Adobe Acrobat Reader. Click on the printer button located at the upper left corner of the document in the Adobe toolbar, and the print dialog box will open. Print the document, fill it out, and return it to the ETSB office.
  • Request a Form: If you would like an application form faxed or mailed to you, please contact the addressing department at 618-825-2160.

Addressing Process for New Subdivisions

  • Pick up a copy of the St Clair County Subdivision Address Request Form. Application forms are available at the St Clair County ETSB at 101 S 1st St in Belleville, or click here to download the application in PDF format.
  • Fill out the application form completely. It is important that you include the eleven-digit parcel identification number(s) for the property being subdivided.
  • Return your completed application to the St Clair County ETSB along with two copies of the subdivision plat and an overview map of the entire subdivision that shows the proposed location of any future additions. If new roads are being built within the subdivision, also include a list of desired roadway names. Note that the roadway names will only be approved if they are not currently in use elsewhere in the county.
  • The Addressing Dept will review the plat, check the roadway names, and assign the addresses. This is normally completed within fifteen working days, at which time one copy of the plat can be picked up at the ETSB office, or it will be mailed back to you. The second copy of the plat will be retained by the St Clair County ETSB.
  • After you receive the returned preliminary plat with addresses, you will need to produce eighteen copies of the subdivision plat as well as the Mylar copy and return to the ETSB office. At that time, the Mylar will be checked and signed off, and the eighteen copies of the plat will be distributed to the necessary parties.
As established by County Ordinance 92-375, the St Clair County ETSB is responsible for assigning all new addresses in St Clair County. This includes individual addresses, addressing for new subdivisions, and verification of existing addresses.
An address is intended to be a description of a specific location. The St Clair County ETSB aims to assign addresses that are logical and consistent, thus providing clearly recognizable descriptions of location so that emergency and other services can locate places and respond in a timely manner. When assigning addresses, the St Clair County ETSB makes every attempt to adhere to the United States Postal Service Addressing Standards as well as the guidelines set forth by the National Emergency Number Association (NENA).