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  "postcodes": [
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      "town_city": "ST ALBANS",
      "district": "ST ALBANS",
      "county": "HERTFORDSHIRE",
      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "al1/gainsborough-avenue/19",
      "property_url": "https://openproperties.uk/al1/gainsborough-avenue/19"
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    {
      "url": "https://openproperties.uk/al1/gainsborough-avenue/19/c3ab06e0-e4f5-463a-9ad9-8c62778cc79d",
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      "saon": null,
      "street": "GAINSBOROUGH AVENUE",
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      "town_city": "ST ALBANS",
      "district": "ST ALBANS",
      "county": "HERTFORDSHIRE",
      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "al1/gainsborough-avenue/19",
      "property_url": "https://openproperties.uk/al1/gainsborough-avenue/19"
    },
    {
      "url": "https://openproperties.uk/al1/gainsborough-avenue/19/fd2972fa-a5f4-4e99-9a97-ae3c8c7352f8",
      "transaction_id": "FD2972FA-A5F4-4E99-9A97-AE3C8C7352F8",
      "price": 371000,
      "date_of_transfer": "2010-11-03",
      "postcode": "AL1 4NJ",
      "property_type": "D",
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      "new_build": false,
      "duration": "F",
      "duration_display": "Freehold",
      "paon": "19",
      "saon": null,
      "street": "GAINSBOROUGH AVENUE",
      "locality": null,
      "town_city": "ST ALBANS",
      "district": "ST ALBANS",
      "county": "HERTFORDSHIRE",
      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "al1/gainsborough-avenue/19",
      "property_url": "https://openproperties.uk/al1/gainsborough-avenue/19"
    }
  ],
  "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
    }
  ]
}