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      "first_sale_date": "1996-01-31",
      "last_sale_date": "2015-10-23",
      "last_price": 310000,
      "url": "https://openproperties.uk/ha4/herlwyn-avenue/212"
    },
    {
      "paon": "212A",
      "saon": null,
      "postcode": "HA4 6HJ",
      "sale_count": 3,
      "first_sale_date": "2000-11-20",
      "last_sale_date": "2010-07-30",
      "last_price": 211000,
      "url": "https://openproperties.uk/ha4/herlwyn-avenue/212a"
    },
    {
      "paon": "214",
      "saon": null,
      "postcode": "HA4 6HJ",
      "sale_count": 6,
      "first_sale_date": "1995-03-03",
      "last_sale_date": "2017-10-16",
      "last_price": 343000,
      "url": "https://openproperties.uk/ha4/herlwyn-avenue/214"
    },
    {
      "paon": "214A",
      "saon": null,
      "postcode": "HA4 6HJ",
      "sale_count": 1,
      "first_sale_date": "2008-01-31",
      "last_sale_date": "2008-01-31",
      "last_price": 240000,
      "url": "https://openproperties.uk/ha4/herlwyn-avenue/214a"
    },
    {
      "paon": "216",
      "saon": null,
      "postcode": "HA4 6HJ",
      "sale_count": 1,
      "first_sale_date": "2011-09-22",
      "last_sale_date": "2011-09-22",
      "last_price": 192500,
      "url": "https://openproperties.uk/ha4/herlwyn-avenue/216"
    },
    {
      "paon": "216A",
      "saon": null,
      "postcode": "HA4 6HJ",
      "sale_count": 1,
      "first_sale_date": "2000-04-14",
      "last_sale_date": "2000-04-14",
      "last_price": 83000,
      "url": "https://openproperties.uk/ha4/herlwyn-avenue/216a"
    }
  ],
  "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.",
  "provenance": {
    "source": "HM Land Registry Price Paid Data",
    "source_url": "https://www.gov.uk/government/statistical-data-sets/price-paid-data-downloads",
    "retrieved_at": null
  }
}