# 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 development would affect a listed building or its setting;
(b) the height of the building would exceed 12 metres;
(c) where the development is within three kilometres of an aerodrome, the height of the building would exceed three metres;
(d) the area of ground which would be covered by the building would exceed 465 square metres;
(e) where development permitted by Class A is carried out more than once on land in the occupation of a particular person, the aggregate of the area of ground covered by any such development would exceed 465 square metres;
(f) where the development consists of the extension of a building, the area of ground covered by the building as extended would exceed the area of ground covered by the existing building by more than 50 per cent.

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Source: https://www.legislation.gov.uk/uksi/1995/418/schedule/2/part/39/chapter/1/paragraph/A.1 (the official version)
Page: https://openlegislation.uk/town-and-country-planning-general-permitted-development-order-1995/schedule-2/part-39/chapter-1/paragraph-A.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.