{
  "tool": "home-size",
  "version": "1.0.0",
  "inputs": {
    "people": 4,
    "bedrooms": 3,
    "storeys": 2,
    "home_area_m2": null,
    "bedroom_1_width_cm": null,
    "bedroom_1_length_cm": null,
    "bedroom_2_width_cm": null,
    "bedroom_2_length_cm": null,
    "bedroom_3_width_cm": null,
    "bedroom_3_length_cm": null,
    "bedroom_4_width_cm": null,
    "bedroom_4_length_cm": null,
    "bedroom_5_width_cm": null,
    "bedroom_5_length_cm": null,
    "bedroom_6_width_cm": null,
    "bedroom_6_length_cm": null
  },
  "answer": {
    "type": "3b4p",
    "bed_spaces": 4,
    "doubles": 1,
    "singles": 2,
    "storeys_used": 2,
    "min_area_m2": 84,
    "min_area_sq_ft": 904,
    "storage_m2": 2.5,
    "ceiling_cm": 230,
    "bedroom_plan": [
      {
        "place": 1,
        "slot": "main double",
        "min_area_m2": 11.5,
        "min_width_cm": 275
      },
      {
        "place": 2,
        "slot": "single",
        "min_area_m2": 7.5,
        "min_width_cm": 215
      },
      {
        "place": 3,
        "slot": "single",
        "min_area_m2": 7.5,
        "min_width_cm": 215
      }
    ],
    "bedrooms_checked": [],
    "bedroom_bed_spaces": null,
    "home": null,
    "averages": {
      "england_m2": 94,
      "typical": [
        {
          "home": "terraced house",
          "area_m2": 88
        },
        {
          "home": "semi-detached house",
          "area_m2": 97
        }
      ],
      "england_per_person_m2": 40,
      "household_people": 2.35
    }
  },
  "summary": "At least 84 m² (904 sq ft) for a new 3-bedroom home for 4 people on two floors (3b4p), including 2.5 m² of built-in storage, by England's nationally described space standard.",
  "working": [
    "3 bedrooms, 4 bed spaces: 1 double (2 each) and 2 singles (1 each), type 3b4p",
    "Table 1, 2-storey column: 84 m²; built-in storage 2.5 m²",
    "England: 94 m² ÷ 2.35 people = 40 m² a person"
  ],
  "notes": [
    "England only. A planning standard for new homes (where the council has adopted it, or under permitted development since 6 April 2021), not a building regulation, and not a legal minimum for existing homes."
  ],
  "sources": [
    {
      "label": "DCLG, Technical housing standards: nationally described space standard (March 2015, notes added 19 May 2016), Table 1 and paragraph 10",
      "url": "https://assets.publishing.service.gov.uk/media/6123c60e8fa8f53dd1f9b04d/160519_Nationally_Described_Space_Standard.pdf",
      "checked": "2026-10-31"
    },
    {
      "label": "GOV.UK, Technical housing standards: nationally described space standard (publication page: 'Applies to England'; 'not a building regulation and remains solely within the planning system')",
      "url": "https://www.gov.uk/government/publications/technical-housing-standards-nationally-described-space-standard",
      "checked": "2026-10-31"
    },
    {
      "label": "MHCLG, English Housing Survey 2018-19, Size of English homes fact sheet",
      "url": "https://assets.publishing.service.gov.uk/media/5f047a01d3bf7f2be8350262/Size_of_English_Homes_Fact_Sheet_EHS_2018.pdf",
      "checked": "2026-10-31"
    },
    {
      "label": "ONS, Families and households in the UK: 2024 (23 Jul 2025)",
      "url": "https://www.ons.gov.uk/peoplepopulationandcommunity/birthsdeathsandmarriages/families/bulletins/familiesandhouseholds/2024",
      "checked": "2026-10-31"
    }
  ],
  "page_url": "https://snuug.app/tools/home-size",
  "snuug": "Snuug is an iPhone app that rebuilds your room in 3D, to within about 3% of its real size, so you can redesign it and see what fits before you buy a thing. Not yet on the App Store (31 October 2026)."
}