{
  "url": "https://openproperties.uk/w9/castellain-road/castellain-mansions/flat-148",
  "address_path": "w9/castellain-road/castellain-mansions/flat-148",
  "paon": "CASTELLAIN MANSIONS",
  "saon": "FLAT 148",
  "street": "CASTELLAIN ROAD",
  "locality": null,
  "town_city": "LONDON",
  "district": "CITY OF WESTMINSTER",
  "county": "GREATER LONDON",
  "postcode": "W9 1HB",
  "postcodes": [
    "W9 1HB"
  ],
  "latitude": 51.52670839332883,
  "longitude": -0.1892394304785335,
  "location_precision": "postcode_centroid",
  "sale_count": 3,
  "first_sale_date": "1999-07-09",
  "last_sale_date": "2012-02-10",
  "last_price": 625000,
  "truncated": false,
  "sales": [
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      "transaction_id": "8B9AEBF8-5CE3-420C-8EF5-EED293600014",
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      "property_type_display": "Flat/maisonette",
      "new_build": false,
      "duration": "L",
      "duration_display": "Leasehold",
      "paon": "CASTELLAIN MANSIONS",
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      "street": "CASTELLAIN ROAD",
      "locality": null,
      "town_city": "LONDON",
      "district": "CITY OF WESTMINSTER",
      "county": "GREATER LONDON",
      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "w9/castellain-road/castellain-mansions/flat-148",
      "property_url": "https://openproperties.uk/w9/castellain-road/castellain-mansions/flat-148"
    },
    {
      "url": "https://openproperties.uk/w9/castellain-road/castellain-mansions/flat-148/a66e13ce-9a82-4b5e-b1ac-03117cb3b749",
      "transaction_id": "A66E13CE-9A82-4B5E-B1AC-03117CB3B749",
      "price": 350000,
      "date_of_transfer": "2003-05-23",
      "postcode": "W9 1HB",
      "property_type": "F",
      "property_type_display": "Flat/maisonette",
      "new_build": false,
      "duration": "L",
      "duration_display": "Leasehold",
      "paon": "CASTELLAIN MANSIONS",
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      "street": "CASTELLAIN ROAD",
      "locality": "LONDON",
      "town_city": "LONDON",
      "district": "CITY OF WESTMINSTER",
      "county": "GREATER LONDON",
      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "w9/castellain-road/castellain-mansions/flat-148",
      "property_url": "https://openproperties.uk/w9/castellain-road/castellain-mansions/flat-148"
    },
    {
      "url": "https://openproperties.uk/w9/castellain-road/castellain-mansions/flat-148/1288f0c6-240e-4db3-a993-a934a3dffe97",
      "transaction_id": "1288F0C6-240E-4DB3-A993-A934A3DFFE97",
      "price": 245000,
      "date_of_transfer": "1999-07-09",
      "postcode": "W9 1HB",
      "property_type": "F",
      "property_type_display": "Flat/maisonette",
      "new_build": false,
      "duration": "L",
      "duration_display": "Leasehold",
      "paon": "CASTELLAIN MANSIONS",
      "saon": "FLAT 148",
      "street": "CASTELLAIN ROAD",
      "locality": null,
      "town_city": "LONDON",
      "district": "CITY OF WESTMINSTER",
      "county": "GREATER LONDON",
      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "w9/castellain-road/castellain-mansions/flat-148",
      "property_url": "https://openproperties.uk/w9/castellain-road/castellain-mansions/flat-148"
    }
  ],
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains HM Land Registry data © Crown copyright and database right. This data is licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right. Postcode locations are Code-Point Open centroids: they locate the postcode, not an individual building.",
  "provenance": [
    {
      "source": "HM Land Registry Price Paid Data",
      "source_url": "https://www.gov.uk/government/statistical-data-sets/price-paid-data-downloads",
      "retrieved_at": "2026-07-09T18:56:26.350736+00:00"
    },
    {
      "source": "OS Code-Point Open",
      "source_url": "https://osdatahub.os.uk/downloads/open/CodePointOpen",
      "retrieved_at": null
    }
  ]
}