The concept of curtilage is relevant to town and country planning in the United Kingdom, particularly as it relates to listed building legislation. The consideration afforded to a listed building may extend to other structures or landscape within the curtilage of the primary structure, if the item(s) in the curtilage is old enough, and physically attached to the main building or otherwise important to the setting of the structure. Current legislation uses a cut-off date of 1947, so that later additions, while they may be within the curtilage, are not included in the listing designation.