# 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) in the case of the installation, alteration or replacement of system apparatus other than on a building or other structure—
(i) the ground or base area of the system apparatus would exceed 1.5 square metres; or
(ii) the system apparatus would exceed a height of 15 metres above ground level;
(b) in the case of the installation, alteration or replacement of system apparatus on a building or other structure—
(i) the highest part of the apparatus when installed, altered, or replaced would exceed in height the highest part of the building or structure by more than 3 metres; or
(ii) the development would result in the presence on the building or structure of more than two microwave antennas.

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Source: https://www.legislation.gov.uk/uksi/1995/418/schedule/2/part/29/crossheading/class-a/paragraph/A.1 (the official version)
Page: https://openlegislation.uk/town-and-country-planning-general-permitted-development-order-1995/schedule-2/part-29/crossheading-class-a/paragraph-A.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.