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


Development is not permitted by Class F if—
(a) the capacity of the system that the flue would serve exceeds 45 kilowatts thermal;
(b) the height of the flue would exceed either—
(i) the highest part of the roof by 1 metre or more, or
(ii) the height of an existing flue which is being replaced,
whichever is the highest;
(c) the installation of the flue would result in the installation on the same building of more than one flue forming part of either a biomass heating system or a combined heat and power system;
(d) the flue would be installed within the curtilage of a listed building;
(e) the flue would be installed on a site designated as a scheduled monument; or
(f) in the case of a building on article 1(5) land or on land within a World Heritage Site, the flue would be installed on a wall or roof slope which fronts a highway.

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Source: https://www.legislation.gov.uk/uksi/1995/418/schedule/2/part/43n1/paragraph/F.1 (the official version)
Page: https://openlegislation.uk/town-and-country-planning-general-permitted-development-order-1995/schedule-2/part-43n1/paragraph-F.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.