# The Town and Country Planning (General Permitted Development) (England) (Amendment) Order 2025, Article 5: Amendment of Class G of Part 14 (air source heat pumps)

Extent: E+W

(1) Class G (installation or alteration etc of air source heat pumps on domestic premises) of Part 14 (renewable energy) is amended as follows.
(2) In paragraph G.1 (development not permitted - MCS Planning Standards), omit “or equivalent standards”.
(3) In paragraph G.2 (development not permitted)—
(a) in sub-paragraph (a), for the words from “more” to the end, substitute—
“—
(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 sub-paragraph (d), for “exceed 0.6 cubic metres” substitute—
“—
(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;”;
(c) omit sub-paragraph (e).
(4) In paragraph G.3 (conditions)—
(a) omit sub-paragraph (a);
(b) before sub-paragraph (b), insert—
“(aa) the air source heat pump is not solely used for the purpose of cooling;”.

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Source: https://www.legislation.gov.uk/uksi/2025/560/article/5 (the official version)
Page: https://openlegislation.uk/town-and-country-planning-general-permitted-development-england-amendment-order-2025/article-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.