# The Town and Country Planning (General Permitted Development) Order 1995, Paragraph A.1: Development not permitted


Development is not permitted by Class A if—
(a) the gross floor space of the original building would be exceeded by more than—
(i) 25%; or
(ii) 50 square metres;
whichever is the lesser.
(b) the height of the building as extended would exceed 4 metres;
(c) any part of the development, other than an alteration, would be within 2 metres of any boundary of the curtilage of the premises;
(d) the development would be within the curtilage of a listed building;
(e) the development would be on article 1(5) land;
(f) the development would be on land within a World Heritage Site;
(g) the development would consist of or include the construction or provision of a veranda, balcony or raised platform;
(h) any part of the development would extend beyond an existing shop front;
(i) the development would involve the insertion or creation of a new shop front or the alteration or replacement of an existing shop front;
(j) the development would involve the installation or replacement of a security grill or shutter on a shop front; or
(k) the development would lead to a reduction in the space available for the parking or turning of vehicles.

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Source: https://www.legislation.gov.uk/uksi/1995/418/schedule/2/part/42n1/paragraph/A.1 (the official version)
Page: https://openlegislation.uk/town-and-country-planning-general-permitted-development-order-1995/schedule-2/part-42n1/paragraph-A.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.