The Small Dwellings Acquisition (Market Value) Order (Northern Ireland) 1950
384  HOUSING

(3) The area of accommodation provided in an outbuilding of permanent construction shall be included, and shall be measured within the external or containing walls of the said outbuilding. For the purposes of this paragraph, "outbuilding" means a building which does not communicate with the house, and which is outside the external or containing walls thereof, whether attached thereto or not.

(4) The area of a porch, verandah, or covered open space shall be included, except so m...