There are very few mill buildings that are listed and protected in any way. Some that are listed include : Wellbrook Beetling Mill (B+), Dyan Corn Mill (B+), Herdmans Mill (B+), Annalong Corn Mill (B+), Mary Brook Mills Crossgar (B+), Orrs Mill Benburb (B+)
Benefits - Support and expertise in restoration, heritage grants, shows leadership and enthusiasm to protect a site for future generations.
Disadvantages - Restrictions to alterations to building (usually drawn up in contract or listed in documentation), potential costs to repair.
If you think your building deserves to be listed check out the different links below. It might be beneficial to seek out information from owners of similar buildings that are listed.
Read the "Listing Process 2015" Guidance PDF below. It lists the different stages, terminology and timeline for the process. Information regarding Building Preservation Notices can be obtained here - www.planningni.gov.uk/index/advice/northern_ireland_environment_agency_guidance/practice_guide_-_building_preservation_notice_complete-2.pdf
Information and Links to ownership of historic buildings