{
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  "locality": "LONDON",
  "town_city": "LONDON",
  "district": "CITY OF WESTMINSTER",
  "county": "GREATER LONDON",
  "postcode": "W1U 6NX",
  "postcodes": [
    "W1U 6NX"
  ],
  "latitude": 51.52113083559027,
  "longitude": -0.15619208160366296,
  "location_precision": "postcode_centroid",
  "sale_count": 4,
  "first_sale_date": "2000-11-24",
  "last_sale_date": "2006-07-27",
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  "truncated": false,
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      "property_type": "F",
      "property_type_display": "Flat/maisonette",
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      "duration": "L",
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      "paon": "PORTMAN MANSIONS",
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      "county": "GREATER LONDON",
      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "w1u/chiltern-street/portman-mansions/flat-14c",
      "property_url": "https://openproperties.uk/w1u/chiltern-street/portman-mansions/flat-14c"
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    {
      "url": "https://openproperties.uk/w1u/chiltern-street/portman-mansions/flat-14c/e980c8ee-269a-4fad-b305-4e4477e98bc2",
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      "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": "w1u/chiltern-street/portman-mansions/flat-14c",
      "property_url": "https://openproperties.uk/w1u/chiltern-street/portman-mansions/flat-14c"
    },
    {
      "url": "https://openproperties.uk/w1u/chiltern-street/portman-mansions/flat-14c/b07b3057-be42-4876-b656-55733d80d984",
      "transaction_id": "B07B3057-BE42-4876-B656-55733D80D984",
      "price": 350000,
      "date_of_transfer": "2001-03-08",
      "postcode": "W1U 6NX",
      "property_type": "F",
      "property_type_display": "Flat/maisonette",
      "new_build": false,
      "duration": "L",
      "duration_display": "Leasehold",
      "paon": "PORTMAN MANSIONS",
      "saon": "FLAT 14C",
      "street": "CHILTERN STREET",
      "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": "w1u/chiltern-street/portman-mansions/flat-14c",
      "property_url": "https://openproperties.uk/w1u/chiltern-street/portman-mansions/flat-14c"
    },
    {
      "url": "https://openproperties.uk/w1u/chiltern-street/portman-mansions/flat-14c/5164b8f4-9fd5-4861-9ac3-187aa9188e63",
      "transaction_id": "5164B8F4-9FD5-4861-9AC3-187AA9188E63",
      "price": 245000,
      "date_of_transfer": "2000-11-24",
      "postcode": "W1U 6NX",
      "property_type": "F",
      "property_type_display": "Flat/maisonette",
      "new_build": false,
      "duration": "L",
      "duration_display": "Leasehold",
      "paon": "PORTMAN MANSIONS",
      "saon": "FLAT 14C",
      "street": "CHILTERN STREET",
      "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": "w1u/chiltern-street/portman-mansions/flat-14c",
      "property_url": "https://openproperties.uk/w1u/chiltern-street/portman-mansions/flat-14c"
    }
  ],
  "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
    }
  ]
}