7. In Part 1 of schedule 1 after class 3A insert—
“Class 3AA.—
(1) The provision within the curtilage of a dwellinghouse of a building for any purpose incidental to the enjoyment of that dwellinghouse.
(2) Development is not permitted by this class if—
(a)the resulting building would exceed—
(i)150 centimetres in height,
(ii)120 centimetres in depth,
(iii)250 centimetres in width,
(b)there is an existing building developed by virtue of this class situated within the curtilage of the dwellinghouse,
(c)the resulting building would obstruct clear sight of a road or footpath by the driver of a vehicle entering or leaving the curtilage of the dwellinghouse,
(d)the resulting building would be situated within the curtilage of a listed building or a World Heritage Site,
(e)the resulting building would create an obstruction to light to another building.
(3) In this class “World Heritage Site” means land appearing on the World Heritage List kept under article 11(2) of the 1972 UNESCO Convention for the Protection of the World Cultural and Natural Heritage M1.”.