# 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 height of any part of the new building erected would exceed—
(i) if within 10 metres of a boundary of the curtilage of the premises, 5 metres;
(ii) in all other cases, the height of the highest building within the curtilage of the premises or 15 metres, whichever is lower;
(b) the height of the building as extended or altered would exceed—
(i) if within 10 metres of a boundary of the curtilage of the premises, 5 metres;
(ii) in all other cases, the height of the building being extended or altered;
(c) any part of the development, would be within 5 metres of any boundary of the curtilage of the premises;
(d) the gross floor space of any new building erected would exceed 100 square metres;
(e) the gross floor space of the original building would be exceeded by more than—
(i) 10% in respect of development on any article 1(5) land or within a World Heritage Site, or 25% in any other case; or
(ii) 500 square metres in respect of development on any article 1(5) land or within a World Heritage Site, or 1,000 square metres in any other case;
whichever is the lesser;
(f) the development would lead to a reduction in the space available for the parking or turning of vehicles; or
(g) the development would be within the curtilage of a listed building.

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Source: https://www.legislation.gov.uk/uksi/1995/418/schedule/2/part/8/paragraph/A.1 (the official version)
Page: https://openlegislation.uk/town-and-country-planning-general-permitted-development-order-1995/schedule-2/part-8/paragraph-A.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.