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

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

Permitted Development E+W

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 E+W

G.1  Development is not permitted by Class G unless the air source heat pump complies with the MCS Planning Standards F1 ....

Textual Amendments

F1 Words in Sch. 2 Pt. 14 Class G para. G.1 omitted (29.5.2025) by virtue of The Town and Country Planning (General Permitted Development) (England) (Amendment) Order 2025 (S.I. 2025/560), arts. 1(2), 5(2) (with art. 7)

G.2  Development is not permitted by Class G if— E+W

(a) in the case of the installation of an air source heat pump, the development would result in the presence of [F2 —

(i) more than one air source heat pump on, or within the curtilage of—

(aa) a dwellinghouse which is not a detached dwellinghouse;

(bb) a block of flats;

(ii) more than two air source heat pumps on, or within the curtilage of, a detached dwellinghouse;]

(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 [F3 —

(i) in the case of the installation of an air source heat pump on, or within the curtilage of, a dwellinghouse, exceed 1.5 cubic metres;

(ii) in the case of the installation of an air source heat pump on, or within the curtilage of, a block of flats, exceed 0.6 cubic metres;]

F4 (e) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(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.

Textual Amendments

F2 Words in Sch. 2 Pt. 14 Class G para. G.2(a) substituted (29.5.2025) by The Town and Country Planning (General Permitted Development) (England) (Amendment) Order 2025 (S.I. 2025/560), arts. 1(2), 5(3)(a)

F3 Words in Sch. 2 Pt. 14 Class G para. G.2(d) substituted (29.5.2025) by The Town and Country Planning (General Permitted Development) (England) (Amendment) Order 2025 (S.I. 2025/560), arts. 1(2), 5(3)(b)

F4 Sch. 2 Pt. 14 Class G para. G.2(e) omitted (29.5.2025) by virtue of The Town and Country Planning (General Permitted Development) (England) (Amendment) Order 2025 (S.I. 2025/560), arts. 1(2), 5(3)(c)

Conditions E+W

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

F5 (a) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

[F6 (aa) the air source heat pump is not solely used for the purpose of cooling;]

(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.

Textual Amendments

F5 Sch. 2 Pt. 14 Class G para. G.3(a) omitted (29.5.2025) by virtue of The Town and Country Planning (General Permitted Development) (England) (Amendment) Order 2025 (S.I. 2025/560), arts. 1(2), 5(4)(a)

F6 Sch. 2 Pt. 14 Class G para. G.3(aa) inserted (29.5.2025) by The Town and Country Planning (General Permitted Development) (England) (Amendment) Order 2025 (S.I. 2025/560), arts. 1(2), 5(4)(b)