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      "address_path": "nw3/belsize-avenue/23a",
      "property_url": "https://openproperties.uk/nw3/belsize-avenue/23a"
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    {
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      "duration": "L",
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      "saon": null,
      "street": "BELSIZE AVENUE",
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      "county": "GREATER LONDON",
      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "nw3/belsize-avenue/23a",
      "property_url": "https://openproperties.uk/nw3/belsize-avenue/23a"
    },
    {
      "url": "https://openproperties.uk/nw3/belsize-avenue/23a/360d2125-17cd-4b63-9a69-8c7fe144d4cd",
      "transaction_id": "360D2125-17CD-4B63-9A69-8C7FE144D4CD",
      "price": 355000,
      "date_of_transfer": "1999-11-23",
      "postcode": "NW3 4BL",
      "property_type": "F",
      "property_type_display": "Flat/maisonette",
      "new_build": false,
      "duration": "L",
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      "paon": "23A",
      "saon": null,
      "street": "BELSIZE AVENUE",
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      "town_city": "LONDON",
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      "address_path": "nw3/belsize-avenue/23a",
      "property_url": "https://openproperties.uk/nw3/belsize-avenue/23a"
    }
  ],
  "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
    }
  ]
}