If the vacant lot has no road access and therefore no official address, you might face challenges in listing it. However, there are alternative methods you can try:
Use a Nearby Address: If there is a property nearby with an address, you could use that address as a reference point for the lot. You can mention the details how the address of the lot is determined so that it helps the interested parties to locate the property.
In this case, you can use '00' as the street/house number and you can reference the street name from a nearby property. Your listing agent will review the address when listing on the MLS and will list with the most appropriate address.
Consult with Local Authorities:
Contact your local planning or zoning department such as the county to inquire about the process for officially assigning an address to a lot without road access. They may be able to provide guidance or assistance in obtaining an official address for the lot.
Legal Description and Parcel ID and the MLS:
Check the legal description on the county records of your area. Check with the parcel ID if there is any reference provided on the county records which can be used in the address of the property. Some MLSs allow the lot number to be used as the street number. Check if your local MLS is allowing the lot number to be used as the street number. You can consult with the local MLS about the same about how they can accept the address of such properties.