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      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "al1/castle-road/51",
      "property_url": "https://openproperties.uk/al1/castle-road/51"
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    {
      "url": "https://openproperties.uk/al1/castle-road/51/328c3f23-5b34-4575-a7f8-c10e2896691d",
      "transaction_id": "328C3F23-5B34-4575-A7F8-C10E2896691D",
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      "street": "CASTLE ROAD",
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      "county": "HERTFORDSHIRE",
      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "al1/castle-road/51",
      "property_url": "https://openproperties.uk/al1/castle-road/51"
    },
    {
      "url": "https://openproperties.uk/al1/castle-road/51/132b219c-06af-41a1-be87-e2d61eb861ab",
      "transaction_id": "132B219C-06AF-41A1-BE87-E2D61EB861AB",
      "price": 76000,
      "date_of_transfer": "1995-12-21",
      "postcode": "AL1 5DQ",
      "property_type": "T",
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      "duration": "F",
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      "paon": "51",
      "saon": null,
      "street": "CASTLE ROAD",
      "locality": "ST. ALBANS",
      "town_city": "ST. ALBANS",
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      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "al1/castle-road/51",
      "property_url": "https://openproperties.uk/al1/castle-road/51"
    }
  ],
  "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
    }
  ]
}