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

SCHEDULE 2 Permitted development rights

PART 7 Non-domestic extensions, alterations etc

Class G – hard surfaces for office buildings

Permitted development

G.  Development consisting of—

(a) the provision of a hard surface within the curtilage of an office building to be used for the purpose of the office concerned; or

(b) the replacement in whole or in part of such a surface.

Development not permitted

G.1  Development is not permitted by Class G if—

(a) the cumulative area of ground covered by a hard surface within the curtilage (excluding hard surfaces already existing on 6th April 2010) would exceed 50 square metres; or

(b) the development would be within the curtilage of a listed building.

Conditions

G.2  Development is permitted by Class G subject to the following conditions—

(a) where there is a risk of groundwater contamination, the hard surface is not made of porous materials; and

(b) in all other cases, either—

(i) the hard surface is made of porous materials, or

(ii) provision is made to direct run-off water from the hard surface to a permeable or porous area or surface within the curtilage of the office building.