Answer:
appurtenances
Explanation
Appurtenance is a legal term that means an attachment of a right or property to the principal. The attachment becomes part of the property such as an air conditioning unit.
This normally applies to property rights or items that are permanent and are passed along with the sale of the property. An appurtenance is a real property, which has now become part and parcel of the property, being immovable or fixed to the land. In this case, appurtenances relate to the land.
Appurtenances allow the ownership of certain items to a person who owns the property. For example, once a tenant installs a new tap head in the property, this would then be considered part of the property. The appurtenances cannot be removed.