{
  "url": "https://openlegislation.uk/building-regulations-2010/regulation-25C",
  "json_url": "https://openlegislation.uk/building-regulations-2010/regulation-25C.json",
  "legislation": "uksi/2010/2214",
  "legislation_title": "The Building Regulations 2010",
  "legislation_url": "https://openlegislation.uk/building-regulations-2010",
  "path": "regulation/25C",
  "kind": "regulation",
  "number": "25C",
  "heading": "New buildings: minimum energy performance requirements",
  "text": "Minimum energy performance requirements must be approved by the Welsh Ministers, calculated and expressed in accordance with the methodology approved pursuant to regulation 24, for—\n(a) new buildings ..., in the form of target primary energy ... rates; and\n(b) when a dwelling is erected, in the form of target fabric performance values.",
  "extent": "E+W",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Reg. 25C inserted (W. but not in relation to excepted energy buildings) (31.7.2014) by The Building (Amendment) (Wales) Regulations 2014 (S.I. 2014/110), regs. 1(3), 5 (with reg. 1(2))"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Reg. 25C inserted (with corresponding changes to match the amendments previously made by S.I. 2014/110, reg. 5 and S.I. 2016/611, reg. 2(9)) (with reg. 1(3))(W. for remaining purposes) (8.6.2018) by The Building Regulations &c. (Amendment) (Excepted Energy Buildings) (Wales) Regulations 2018 (S.I. 2018/558), regs. 1(2), 7(3) (with reg. 29)"
    },
    {
      "type": "F",
      "label": "F3",
      "text": "Word in reg. 25C substituted (W. but not in relation to excepted energy buildings) (17.6.2016) by The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(9)(a) (with reg. 1(3))"
    },
    {
      "type": "F",
      "label": "F4",
      "text": "Words in reg. 25C inserted (W. but not in relation to excepted energy buildings) (17.6.2016) by The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(9)(b) (with reg. 1(3))"
    },
    {
      "type": "F",
      "label": "F5",
      "text": "Words in reg. 25C(a) omitted (W.) (23.11.2022) by virtue of The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 6(a)(i) (with reg. 21)"
    },
    {
      "type": "F",
      "label": "F6",
      "text": "Word in reg. 25C(a) omitted (W.) (23.11.2022) by virtue of The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 6(a)(ii) (with reg. 21)"
    },
    {
      "type": "F",
      "label": "F7",
      "text": "Words in reg. 25C(b) substituted (W.) (23.11.2022) by The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 6(b) (with reg. 21)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/2010/2214/regulation/25C",
    "retrieved_at": "2026-10-29T02:31:48.980832+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}