The Town and Country Planning (General Permitted Development) (England) Order 2015 No. 596

SCHEDULE 2 E+W Permitted development rights

PART 19 E+W Development by the Crown or for national security purposes

Class C – developments on operational Crown land E+W

Permitted development E+W

C.  Development carried out by or on behalf of the Crown on operational Crown land for operational purposes consisting of—

(a) the installation of additional or replacement plant or machinery;

(b) the provision, rearrangement or replacement of a sewer, main, pipe, cable or other apparatus; or

(c) the provision, rearrangement or replacement of a private way, private railway, siding or conveyor.

Development not permitted E+W

C.1  Development described in Class C(a) is not permitted if—

(a) it would materially affect the external appearance of the premises; or

(b) any plant or machinery would exceed a height of 15 metres above ground level or the height of anything replaced, whichever is the greater.

Interpretation of Class C E+W

C.2  In Class C, “ Crown land” does not include land in or adjacent to and occupied together with a mine.