The Planning (General Permitted Development) Order (Northern Ireland) 2015

PART 19 N.I. OTHER TELECOMMUNICATIONS DEVELOPMENT

Class A
Permitted development	A.	The installation, alteration or replacement on any building or other structure of a height of 15 metres or more of a microwave antenna and any structure intended for the support of a microwave antenna.
Development not permitted	A.1	Development is not permitted by Class A if— (a) the building is a dwellinghouse or the building or other structure is within the curtilage of a dwellinghouse; (b) it would consist of development of a kind described in paragraph A of Part 18; (c) it would result in the presence on the building or structure of more than four antennas; (d) in the case of an antenna installed on a chimney, the length of the antenna would exceed 60 centimetres; (e) in all other cases, the length of the antenna would exceed 130 centimetres; (f) it would consist of the installation of an antenna with a cubic capacity in excess of 35 litres; (g) the highest part of the antenna or its supporting structure would be more than 3 metres higher than the highest part of the building or structure on which it is installed or is to be installed; (h) in the case of a building or structure situated within a designated area it would consist of the installation of an antenna on a chimney, wall or roof slope which faces onto and is visible from a road.
Conditions	A.2	Development is permitted by Class A subject to the following conditions— (a) an antenna shall, so far as is practicable, be sited so as to minimise its effect on the external appearance of the building or structure on which it is to be installed; (b) an antenna no longer needed for reception or transmission purposes shall be removed from the building or structure as soon as is reasonably practicable; (c) the length of an antenna is to be measured in any linear direction, and shall exclude any projecting feed element, reinforcing rim, mounting or brackets.
Class B
Permitted development	B.	The installation, alteration or replacement on any building or other structure of a height of less than 15 metres of a microwave antenna.
Development not permitted	B.1	Development is not permitted by Class B if— (a) the building is a dwellinghouse or the building or other structure is within the curtilage of a dwellinghouse; (b) it would consist of development of a kind described in paragraph A of Part 18; (c) it would result in the presence on the building or structure of— (i) more than two antennas; (ii) a single antenna exceeding 100 centimetres in length; (iii) two antennas which do not meet the relevant size criteria; (iv) an antenna installed on a chimney, where the length of the antenna would exceed 60 centimetres; (v) an antenna installed on a chimney, where the antenna would protrude over the chimney; (vi) an antenna with a cubic capacity in excess of 35 litres; (d) in the case of an antenna to be installed on a roof without a chimney, the highest part of the antenna would be higher than the highest part of the roof; (e) in the case of an antenna to be installed on a roof with a chimney, the highest part of the antenna would be higher than the highest part of the chimney stack, or 60 centimetres measured from the highest part of the ridge tiles of the roof, whichever is the lower; (f) in the case of a building or structure situated in a designated area, it would consist of the installation of an antenna on a chimney, wall or roof slope which faces onto and is visible from a road.
Conditions	B.2	Development is permitted by Class B subject to the following conditions— (a) an antenna shall, so far as practicable, be sited so as to minimise its effect on the external appearance of the building or structure on which it is to be installed; (b) an antenna no longer needed for reception or transmission purposes shall be removed from the building or structure as soon as reasonably practicable.
	B.3	The relevant size criteria for the purposes of paragraph B.1(c)(iii) are that— (a) only one of the antennas may exceed 60 centimetres in length; and (b) any antenna which exceeds 60 centimetres in length must not exceed 100 centimetres in length.
	B.4	The length of an antenna is to be measured in any linear direction and shall exclude any projecting feed element, reinforcing rim, mounting or brackets.