55 Meaning of “development” and “new development”
55 Meaning of “development” and “new development”

(1)     Subject to the following provisions of this section, in this Act, except where the context otherwise requires, “development,” means the carrying out of building, engineering, mining or other operations in, on, over or under land, or the making of any material change in the use of any buildings or other land.

[(1A)     For the purposes of this Act “building operations” includes—

(a)     demolition of buildings;

(b)     rebuilding;

(c)     structural alterations of or additions to buildings; and

(d)     other operations normally undertaken by a person carrying on business as a builder.]

(2)     The following operations or uses of land shall not be taken for the purposes of this Act to involve development of the land—

(a)     the carrying out for the maintenance, improvement or other alteration of any building of works which—

(i)     affect only the interior of the building, or

(ii)     do not materially affect the external appearance of the building,

and are not works for making good war damage or works begun after 5th December 1968 for the alteration of a building by providing additional space in it underground;

(b)     the carrying out on land within the boundaries of a road by a . . . highway authority of any works required for the maintenance or improvement of the road [but, in the case of any such works which are not exclusively for the maintenance of the road, not including any works which may have significant adverse effects on the environment];