{
  "url": "https://openlegislation.uk/building-regulations-2000/regulation-3",
  "json_url": "https://openlegislation.uk/building-regulations-2000/regulation-3.json",
  "legislation": "uksi/2000/2531",
  "legislation_title": "The Building Regulations 2000",
  "legislation_url": "https://openlegislation.uk/building-regulations-2000",
  "path": "regulation/3",
  "kind": "regulation",
  "number": "3",
  "heading": "Meaning of building work",
  "text": "(1) In these Regulations “building work” means—\n(a) the erection or extension of a building;\n(b) the provision or extension of a controlled service or fitting in or in connection with a building;\n(c) the material alteration of a building, or a controlled service or fitting, as mentioned in paragraph (2);\n(d) work required by regulation 6 (requirements relating to material change of use);\n(e) the insertion of insulating material into the cavity wall of a building;\n(f) work involving the underpinning of a building.\n(2) An alteration is material for the purposes of these Regulations if the work, or any part of it, would at any stage result—\n(a) in a building or controlled service or fitting not complying with a relevant requirement where previously it did; or\n(b) in a building or controlled service or fitting which before the work commenced did not comply with a relevant requirement, being more unsatisfactory in relation to such a requirement.\n(3) In paragraph (2) “relevant requirement” means any of the following applicable requirements of Schedule 1, namely—\nPart A (structure)\nparagraph B1 (means of warning and escape)\nparagraph B3 (internal fire spread—structure)\nparagraph B4 (external fire spread)\nparagraph B5 (access and facilities for the fire service)\nPart M (access and facilities for disabled people).",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [
    {
      "type": "words inserted",
      "affecting": "uksi/2001/3335",
      "affecting_title": "The Building (Amendment) Regulations 2001"
    },
    {
      "type": "inserted",
      "affecting": "uksi/2001/3335",
      "affecting_title": "The Building (Amendment) Regulations 2001"
    },
    {
      "type": "am (1.5.2004)",
      "affecting": "uksi/2003/2692",
      "affecting_title": "The Building (Amendment) Regulations 2003"
    },
    {
      "type": "words substituted",
      "affecting": "uksi/2004/3210",
      "affecting_title": "The Building (Amendment) (No.3) Regulations 2004"
    },
    {
      "type": "words substituted",
      "affecting": "uksi/2004/1808",
      "affecting_title": "The Building (Amendment) (No.2) Regulations 2004"
    }
  ],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/2000/2531/regulation/3",
    "retrieved_at": "2026-10-29T08:20:24.293933+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."
}