{
  "url": "https://openlegislation.uk/town-and-country-planning-general-development-order-1988/schedule-2/part-1/chapter-2/paragraph-B.1",
  "json_url": "https://openlegislation.uk/town-and-country-planning-general-development-order-1988/schedule-2/part-1/chapter-2/paragraph-B.1.json",
  "legislation": "uksi/1988/1813",
  "legislation_title": "The Town and Country Planning General Development Order 1988",
  "legislation_url": "https://openlegislation.uk/town-and-country-planning-general-development-order-1988",
  "path": "schedule/2/part/1/chapter/2/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 fronts any highway;\n(c) it would increase the cubic content of the dwellinghouse by more than 40 cubic metres, in the case of a terrace house, or 50 cubic metres in any other case;\n(d) the cubic content of the resulting building would exceed the cubic content of the original dwellinghouse—\n(i) in the case of a terrace house by more than 50 cubic metres or 10%, whichever is the greater,\n(ii) in any other case, by more than 70 metres or 15%, whichever is the greater, or\n(iii) in any case, by more than 115 cubic metres; or\n(e) the dwellinghouse is on article 1(5) land.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [
    {
      "type": "amended",
      "affecting": "uksi/1994/2595",
      "affecting_title": "The Town and Country Planning General Development (Amendment) (No. 2) Order 1994"
    },
    {
      "type": "substituted",
      "affecting": "uksi/1994/2595",
      "affecting_title": "The Town and Country Planning General Development (Amendment) (No. 2) Order 1994"
    },
    {
      "type": "revoked",
      "affecting": "uksi/1995/418",
      "affecting_title": "The Town and Country Planning (General Permitted Development) Order 1995"
    },
    {
      "type": "amended",
      "affecting": "uksi/1992/1493",
      "affecting_title": "The Town and Country Planning General Development (Amendment) (No. 4) Order 1992"
    },
    {
      "type": "amended",
      "affecting": "uksi/1992/1493",
      "affecting_title": "The Town and Country Planning General Development (Amendment) (No. 4) Order 1992"
    },
    {
      "type": "amended",
      "affecting": "uksi/1991/1536",
      "affecting_title": "The Town and Country Planning General Development (Amendment) Order 1991"
    },
    {
      "type": "modified",
      "affecting": "ukla/1992/5",
      "affecting_title": "Avon Weir Act 1992"
    },
    {
      "type": "modified",
      "affecting": "ukla/1992/5",
      "affecting_title": "Avon Weir Act 1992"
    },
    {
      "type": "modified",
      "affecting": "ukla/1992/5",
      "affecting_title": "Avon Weir Act 1992"
    },
    {
      "type": "added",
      "affecting": "uksi/1995/298",
      "affecting_title": "The Town and Country Planning General Development (Amendment) Order 1995"
    },
    {
      "type": "added",
      "affecting": "uksi/1995/298",
      "affecting_title": "The Town and Country Planning General Development (Amendment) Order 1995"
    },
    {
      "type": "substituted",
      "affecting": "uksi/1992/2450",
      "affecting_title": "The Town and Country Planning General Development (Amendment) (No. 6) Order 1992"
    },
    {
      "type": "revoked",
      "affecting": "uksi/1992/2450",
      "affecting_title": "The Town and Country Planning General Development (Amendment) (No. 6) Order 1992"
    },
    {
      "type": "substituted",
      "affecting": "uksi/1992/2450",
      "affecting_title": "The Town and Country Planning General Development (Amendment) (No. 6) Order 1992"
    },
    {
      "type": "mod",
      "affecting": "uksi/1994/678",
      "affecting_title": "The Town and Country Planning General Development (Amendment) Order 1994"
    },
    {
      "type": "amended",
      "affecting": "uksi/1989/603",
      "affecting_title": "The Town and Country Planning General Development (Amendment) Order 1989"
    },
    {
      "type": "amended",
      "affecting": "uksi/1989/1590",
      "affecting_title": "The Town and Country Planning General Development (Amendment) (No. 2) Order 1989"
    },
    {
      "type": "added",
      "affecting": "uksi/1992/1280",
      "affecting_title": "The Town and Country Planning General Development (Amendment) (No. 3) Order 1992"
    },
    {
      "type": "amended",
      "affecting": "uksi/1990/457",
      "affecting_title": "The Town and Country Planning General Development (Amendment) Order 1990"
    },
    {
      "type": "added",
      "affecting": "uksi/1992/609",
      "affecting_title": "The Town and Country Planning General Development (Amendment) Order 1992"
    },
    {
      "type": "modified",
      "affecting": "ukla/1992/18",
      "affecting_title": "Greater Manchester (Light Rapid Transit System) Act 1992"
    },
    {
      "type": "amended",
      "affecting": "uksi/1990/2032",
      "affecting_title": "The Town and Country Planning General Development (Amendment) (No. 2) Order 1990"
    },
    {
      "type": "amended",
      "affecting": "uksi/1989/1968",
      "affecting_title": "The Water (Consequential Amendments) Regulations 1989"
    }
  ],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1988/1813/schedule/2/part/1/chapter/2/paragraph/B.1",
    "retrieved_at": "2026-10-29T15:56:26.565388+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."
}