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The Town and Country Planning (General Permitted Development) (England) Order 2015

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Class G – installation or alteration etc of air source heat pumps on domestic premises

Permitted Development

G.  The installation, alteration or replacement of a microgeneration air source heat pump—

(a)on a dwellinghouse or a block of flats; or

(b)within the curtilage of a dwellinghouse or a block of flats, including on a building within that curtilage.

Development not permitted

G.1  Development is not permitted by Class G unless the air source heat pump complies with the MCS Planning Standards or equivalent standards.

G.2  Development is not permitted by Class G if—

(a)in the case of the installation of an air source heat pump, the development would result in the presence of more than 1 air source heat pump on the same building or within the curtilage of the building or block of flats;

(b)in the case of the installation of an air source heat pump, a wind turbine is installed on the same building or within the curtilage of the dwellinghouse or block of flats;

(c)in the case of the installation of an air source heat pump, a stand-alone wind turbine is installed within the curtilage of the dwellinghouse or block of flats;

(d)the volume of the air source heat pump’s outdoor compressor unit (including any housing) would exceed 0.6 cubic metres;

(e)any part of the air source heat pump would be installed within 1 metre of the boundary of the curtilage of the dwellinghouse or block of flats;

(f)the air source heat pump would be installed on a pitched roof;

(g)the air source heat pump would be installed on a flat roof where it would be within 1 metre of the external edge of that roof;

(h)the air source heat pump would be installed on a site designated as a scheduled monument;

(i)the air source heat pump would be installed on a building or on land within the curtilage of the dwellinghouse or the block of flats if the dwellinghouse or the block of flats is a listed building;

(j)in the case of land within a conservation area or which is a World Heritage Site the air source heat pump—

(i)would be installed on a wall or a roof which fronts a highway; or

(ii)would be installed so that it is nearer to any highway which bounds the curtilage than the part of the dwellinghouse or block of flats which is nearest to that highway; or

(k)in the case of land, other than land within a conservation area or which is a World Heritage Site, the air source heat pump would be installed on a wall of a dwellinghouse or block of flats if—

(i)that wall fronts a highway; and

(ii)the air source heat pump would be installed on any part of that wall which is above the level of the ground floor storey.

Conditions

G.3  Development is permitted by Class G subject to the following conditions—

(a)the air source heat pump is used solely for heating purposes;

(b)the air source heat pump is, so far as practicable, sited so as to minimise its effect on the external appearance of the building;

(c)the air source heat pump is, so far as practicable, sited so as to minimise its effect on the amenity of the area; and

(d)the air source heat pump is removed as soon as reasonably practicable when no longer needed.

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