{
  "url": "https://openlegislation.uk/town-and-country-planning-general-permitted-development-amendment-wales-order-2013/schedule/paragraph-B.1",
  "json_url": "https://openlegislation.uk/town-and-country-planning-general-permitted-development-amendment-wales-order-2013/schedule/paragraph-B.1.json",
  "legislation": "wsi/2013/1776",
  "legislation_title": "The Town and Country Planning (General Permitted Development) (Amendment) (Wales) Order 2013",
  "legislation_url": "https://openlegislation.uk/town-and-country-planning-general-permitted-development-amendment-wales-order-2013",
  "path": "schedule/paragraph/B.1",
  "kind": "paragraph",
  "number": "B.1",
  "heading": "Development not permitted",
  "text": "Development is not permitted by Class B if—\n(a) any part of the dwellinghouse would, as a result of the works, exceed the height of the highest part of the existing roof;\n(b) any part of the dwellinghouse would, as a result of the works, extend beyond the plane of any existing roof slope which forms the principal elevation of the dwellinghouse;\n(c) any part of the dwellinghouse would, as a result of the works, extend beyond the plane of any existing roof slope which—\n(i) is comprised in a side elevation of the existing dwellinghouse; and\n(ii) is within 10.5 metres from a highway opposite the side elevation of the dwellinghouse;\n(d) the cubic content of the resulting roof space would exceed the cubic content of the original roof space by more than—\n(i) 40 cubic metres in the case of a terrace house; or\n(ii) 50 cubic metres in any other case;\n(e) other than in the case of a hip to gable enlargement, any part of the enlargement would be less than 20 centimetres from the eaves of the existing roof;\n(f) it would consist of or include—\n(i) the construction or provision of a veranda or raised platform ;\n(ii) the construction or provision of a balcony which—\n(aa) contains a platform of any description;\n(bb) projects from the part of the exterior of the dwellinghouse to which it is affixed by more than 30 centimetres; or\n(cc) if projected downwards in a vertical line to ground level, is within 10.5 metres of any boundary of the curtilage of the dwellinghouse opposite the relevant side elevation; or\n(iii) the construction or provision of a roof terrace, whether or not it would incorporate associated railings, fencing or other means of enclosure; or\n(g) the dwellinghouse is on article 1(5) land or within a World Heritage Site.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/wsi/2013/1776/schedule/paragraph/B.1",
    "retrieved_at": "2026-10-28T23:42:12.619846+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."
}