The Town and Country Planning (General Permitted Development) (England) Order 2015

Class I – developments relating to an industrial process

Permitted development

I.  Development carried out on industrial land for the purposes of an industrial process 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

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

(a) it would materially affect the external appearance of the premises of the undertaking concerned; 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 I

I.2  For the purposes of Class I, “industrial land” means land used for the carrying out of an industrial process, including land used for the purposes of an industrial undertaking as a dock, harbour or quay but does not include land in or adjacent to and occupied together with a mine.