# The Town and Country Planning (General Permitted Development) (Amendment) (Wales) Order 2026, Article 6: Amendment of paragraph J of Part 40 of Schedule 2 (interpretation of Part 40)


In Part 40 (air source heat pumps), in paragraph J (interpretation of Part 40)—
(a) for the definition of “dwellinghouse” substitute—
““dwellinghouse” does not include a building containing one or more flats, or a flat contained within such a building;”;
(b) for the definition of “MSC Planning Standards” substitute—
““MCS Planning Standards” means the product and installation standards for air source heat pumps and wind turbines specified in Microgeneration Certificate Scheme MCS 020(a) and MCS 020(b) respectively”;
(c) after the definition of “anemometry mast” insert—
““block of flats” means a building which consists wholly of flats;
“detached” means that the building does not share a party wall with a neighbouring building;
“detached dwellinghouse” means a dwellinghouse or building, as the case may be, which does not share a party wall with a neighbouring building;”;
(d) after the definition of “dwellinghouse” insert—
““flat” means a separate and self-contained premises constructed for use for the purposes of a dwellinghouse;”.

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Source: https://www.legislation.gov.uk/wsi/2026/79/article/6 (the official version)
Page: https://openlegislation.uk/town-and-country-planning-general-permitted-development-amendment-wales-order-2026/article-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.