{
  "url": "https://openproperties.uk/hu6/welwyn-park-avenue",
  "outcode": "HU6",
  "street": "WELWYN PARK AVENUE",
  "street_slug": "welwyn-park-avenue",
  "property_count": 165,
  "truncated": false,
  "properties": [
    {
      "paon": "1",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 3,
      "first_sale_date": "1998-02-06",
      "last_sale_date": "2006-12-21",
      "last_price": 143000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/1"
    },
    {
      "paon": "3",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "2000-04-26",
      "last_sale_date": "2000-04-26",
      "last_price": 49000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/3"
    },
    {
      "paon": "4",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 4,
      "first_sale_date": "2001-04-27",
      "last_sale_date": "2017-07-28",
      "last_price": 132000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/4"
    },
    {
      "paon": "8",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 2,
      "first_sale_date": "1997-06-13",
      "last_sale_date": "2001-02-23",
      "last_price": 39500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/8"
    },
    {
      "paon": "9",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "2017-05-12",
      "last_sale_date": "2017-05-12",
      "last_price": 120000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/9"
    },
    {
      "paon": "10",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 3,
      "first_sale_date": "1998-03-26",
      "last_sale_date": "2003-06-20",
      "last_price": 64950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/10"
    },
    {
      "paon": "12",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 2,
      "first_sale_date": "1997-04-03",
      "last_sale_date": "2003-08-08",
      "last_price": 61950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/12"
    },
    {
      "paon": "13",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 3,
      "first_sale_date": "1997-03-27",
      "last_sale_date": "2024-10-25",
      "last_price": 110000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/13"
    },
    {
      "paon": "14",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 3,
      "first_sale_date": "2000-10-13",
      "last_sale_date": "2021-12-03",
      "last_price": 152000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/14"
    },
    {
      "paon": "15",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "2012-08-03",
      "last_sale_date": "2012-08-03",
      "last_price": 96000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/15"
    },
    {
      "paon": "17",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "1999-11-19",
      "last_sale_date": "1999-11-19",
      "last_price": 39250,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/17"
    },
    {
      "paon": "18",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 4,
      "first_sale_date": "2002-04-05",
      "last_sale_date": "2025-09-08",
      "last_price": 140000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/18"
    },
    {
      "paon": "19",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "2007-03-26",
      "last_sale_date": "2007-03-26",
      "last_price": 60000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/19"
    },
    {
      "paon": "20",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "2023-01-27",
      "last_sale_date": "2023-01-27",
      "last_price": 90000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/20"
    },
    {
      "paon": "24",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 4,
      "first_sale_date": "1999-10-21",
      "last_sale_date": "2021-06-29",
      "last_price": 114000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/24"
    },
    {
      "paon": "26",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "2015-03-23",
      "last_sale_date": "2015-03-23",
      "last_price": 82000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/26"
    },
    {
      "paon": "27",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 6,
      "first_sale_date": "2000-11-08",
      "last_sale_date": "2018-09-20",
      "last_price": 94000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/27"
    },
    {
      "paon": "28",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 2,
      "first_sale_date": "2019-08-02",
      "last_sale_date": "2022-07-12",
      "last_price": 147000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/28"
    },
    {
      "paon": "29",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "2000-09-15",
      "last_sale_date": "2000-09-15",
      "last_price": 22000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/29"
    },
    {
      "paon": "30",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "2009-06-17",
      "last_sale_date": "2009-06-17",
      "last_price": 67500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/30"
    },
    {
      "paon": "34",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "2025-02-20",
      "last_sale_date": "2025-02-20",
      "last_price": 120000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/34"
    },
    {
      "paon": "35",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 3,
      "first_sale_date": "2011-10-28",
      "last_sale_date": "2021-04-30",
      "last_price": 150000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/35"
    },
    {
      "paon": "36",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "1996-01-23",
      "last_sale_date": "1996-01-23",
      "last_price": 29995,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/36"
    },
    {
      "paon": "37",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 1,
      "first_sale_date": "1995-03-03",
      "last_sale_date": "1995-03-03",
      "last_price": 39750,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/37"
    },
    {
      "paon": "39",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 1,
      "first_sale_date": "2020-09-18",
      "last_sale_date": "2020-09-18",
      "last_price": 132000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/39"
    },
    {
      "paon": "40",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "1997-05-30",
      "last_sale_date": "1997-05-30",
      "last_price": 27500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/40"
    },
    {
      "paon": "44",
      "saon": null,
      "postcode": "HU6 7DH",
      "sale_count": 1,
      "first_sale_date": "2019-06-21",
      "last_sale_date": "2019-06-21",
      "last_price": 133000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/44"
    },
    {
      "paon": "50",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 1,
      "first_sale_date": "2022-02-22",
      "last_sale_date": "2022-02-22",
      "last_price": 105000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/50"
    },
    {
      "paon": "51",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 1,
      "first_sale_date": "2007-10-22",
      "last_sale_date": "2007-10-22",
      "last_price": 100000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/51"
    },
    {
      "paon": "52",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 3,
      "first_sale_date": "2008-06-27",
      "last_sale_date": "2018-05-30",
      "last_price": 130000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/52"
    },
    {
      "paon": "54",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 5,
      "first_sale_date": "1996-03-04",
      "last_sale_date": "2025-07-10",
      "last_price": 140000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/54"
    },
    {
      "paon": "55",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 1,
      "first_sale_date": "2002-01-31",
      "last_sale_date": "2002-01-31",
      "last_price": 29500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/55"
    },
    {
      "paon": "56",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 5,
      "first_sale_date": "1997-07-28",
      "last_sale_date": "2019-08-23",
      "last_price": 94950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/56"
    },
    {
      "paon": "58",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 2,
      "first_sale_date": "2004-03-31",
      "last_sale_date": "2021-06-03",
      "last_price": 124500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/58"
    },
    {
      "paon": "59",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 2,
      "first_sale_date": "1995-06-28",
      "last_sale_date": "2000-12-01",
      "last_price": 42950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/59"
    },
    {
      "paon": "60",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 1,
      "first_sale_date": "2022-03-11",
      "last_sale_date": "2022-03-11",
      "last_price": 140000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/60"
    },
    {
      "paon": "61",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 1,
      "first_sale_date": "2002-05-31",
      "last_sale_date": "2002-05-31",
      "last_price": 47950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/61"
    },
    {
      "paon": "63",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 2,
      "first_sale_date": "1997-02-28",
      "last_sale_date": "2004-08-31",
      "last_price": 87000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/63"
    },
    {
      "paon": "64",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 3,
      "first_sale_date": "1996-12-06",
      "last_sale_date": "2022-05-03",
      "last_price": 135000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/64"
    },
    {
      "paon": "65",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 1,
      "first_sale_date": "2020-12-09",
      "last_sale_date": "2020-12-09",
      "last_price": 120000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/65"
    },
    {
      "paon": "68",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 1,
      "first_sale_date": "2001-09-21",
      "last_sale_date": "2001-09-21",
      "last_price": 29250,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/68"
    },
    {
      "paon": "70",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 1,
      "first_sale_date": "2008-01-03",
      "last_sale_date": "2008-01-03",
      "last_price": 109000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/70"
    },
    {
      "paon": "75",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 2,
      "first_sale_date": "2008-09-26",
      "last_sale_date": "2024-11-22",
      "last_price": 109250,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/75"
    },
    {
      "paon": "76",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 3,
      "first_sale_date": "2013-04-26",
      "last_sale_date": "2019-02-21",
      "last_price": 98500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/76"
    },
    {
      "paon": "77",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 1,
      "first_sale_date": "2002-01-24",
      "last_sale_date": "2002-01-24",
      "last_price": 27000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/77"
    },
    {
      "paon": "78",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 3,
      "first_sale_date": "2001-09-28",
      "last_sale_date": "2015-09-04",
      "last_price": 75000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/78"
    },
    {
      "paon": "79",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 2,
      "first_sale_date": "1996-07-31",
      "last_sale_date": "2005-10-14",
      "last_price": 82950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/79"
    },
    {
      "paon": "80",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 3,
      "first_sale_date": "1998-06-25",
      "last_sale_date": "2015-10-08",
      "last_price": 72500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/80"
    },
    {
      "paon": "81",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 2,
      "first_sale_date": "2020-01-15",
      "last_sale_date": "2020-04-15",
      "last_price": 88500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/81"
    },
    {
      "paon": "82",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 3,
      "first_sale_date": "2019-06-22",
      "last_sale_date": "2024-12-16",
      "last_price": 105000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/82"
    },
    {
      "paon": "83",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "2022-04-28",
      "last_sale_date": "2022-04-28",
      "last_price": 130000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/83"
    },
    {
      "paon": "84",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 2,
      "first_sale_date": "2002-06-28",
      "last_sale_date": "2017-12-13",
      "last_price": 90000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/84"
    },
    {
      "paon": "85",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 4,
      "first_sale_date": "1997-07-30",
      "last_sale_date": "2022-06-17",
      "last_price": 110000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/85"
    },
    {
      "paon": "86",
      "saon": null,
      "postcode": "HU6 7DJ",
      "sale_count": 1,
      "first_sale_date": "2003-12-16",
      "last_sale_date": "2003-12-16",
      "last_price": 67950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/86"
    },
    {
      "paon": "87",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 3,
      "first_sale_date": "2016-08-05",
      "last_sale_date": "2025-03-03",
      "last_price": 108000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/87"
    },
    {
      "paon": "89",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 2,
      "first_sale_date": "2005-09-16",
      "last_sale_date": "2009-08-17",
      "last_price": 85950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/89"
    },
    {
      "paon": "91",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 5,
      "first_sale_date": "2000-05-24",
      "last_sale_date": "2018-05-25",
      "last_price": 77500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/91"
    },
    {
      "paon": "92",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 5,
      "first_sale_date": "1998-02-13",
      "last_sale_date": "2022-05-20",
      "last_price": 113000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/92"
    },
    {
      "paon": "93",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 2,
      "first_sale_date": "2021-09-17",
      "last_sale_date": "2023-12-01",
      "last_price": 111000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/93"
    },
    {
      "paon": "94",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "2006-07-19",
      "last_sale_date": "2006-07-19",
      "last_price": 80000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/94"
    },
    {
      "paon": "95",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 2,
      "first_sale_date": "2012-11-09",
      "last_sale_date": "2024-01-26",
      "last_price": 105000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/95"
    },
    {
      "paon": "96",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 3,
      "first_sale_date": "1997-09-26",
      "last_sale_date": "2005-06-29",
      "last_price": 73500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/96"
    },
    {
      "paon": "97",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "2023-10-20",
      "last_sale_date": "2023-10-20",
      "last_price": 92000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/97"
    },
    {
      "paon": "98",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "2003-11-20",
      "last_sale_date": "2003-11-20",
      "last_price": 59995,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/98"
    },
    {
      "paon": "99",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 6,
      "first_sale_date": "1996-06-10",
      "last_sale_date": "2020-03-27",
      "last_price": 105000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/99"
    },
    {
      "paon": "100",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 4,
      "first_sale_date": "2001-06-29",
      "last_sale_date": "2021-04-30",
      "last_price": 110000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/100"
    },
    {
      "paon": "101",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "2003-11-19",
      "last_sale_date": "2003-11-19",
      "last_price": 57000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/101"
    },
    {
      "paon": "102",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 2,
      "first_sale_date": "2004-07-09",
      "last_sale_date": "2004-07-09",
      "last_price": 50000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/102"
    },
    {
      "paon": "103",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "2007-06-08",
      "last_sale_date": "2007-06-08",
      "last_price": 97000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/103"
    },
    {
      "paon": "105",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 3,
      "first_sale_date": "1995-06-16",
      "last_sale_date": "2003-11-28",
      "last_price": 68950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/105"
    },
    {
      "paon": "106",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "1997-12-05",
      "last_sale_date": "1997-12-05",
      "last_price": 33000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/106"
    },
    {
      "paon": "107",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 5,
      "first_sale_date": "1995-04-28",
      "last_sale_date": "2022-05-27",
      "last_price": 115000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/107"
    },
    {
      "paon": "108",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 4,
      "first_sale_date": "2002-12-10",
      "last_sale_date": "2007-03-02",
      "last_price": 82500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/108"
    },
    {
      "paon": "109",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "2022-05-20",
      "last_sale_date": "2022-05-20",
      "last_price": 122000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/109"
    },
    {
      "paon": "110",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "2001-08-20",
      "last_sale_date": "2001-08-20",
      "last_price": 22050,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/110"
    },
    {
      "paon": "112",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 5,
      "first_sale_date": "1996-07-05",
      "last_sale_date": "2024-01-12",
      "last_price": 108000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/112"
    },
    {
      "paon": "114",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "2002-02-26",
      "last_sale_date": "2002-02-26",
      "last_price": 24000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/114"
    },
    {
      "paon": "115",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "2017-02-22",
      "last_sale_date": "2017-02-22",
      "last_price": 63000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/115"
    },
    {
      "paon": "116",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 5,
      "first_sale_date": "1995-08-25",
      "last_sale_date": "2017-02-03",
      "last_price": 80000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/116"
    },
    {
      "paon": "117",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 2,
      "first_sale_date": "2012-07-09",
      "last_sale_date": "2017-08-10",
      "last_price": 90000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/117"
    },
    {
      "paon": "118",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 2,
      "first_sale_date": "2002-11-27",
      "last_sale_date": "2004-05-28",
      "last_price": 69950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/118"
    },
    {
      "paon": "119",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 4,
      "first_sale_date": "2000-08-31",
      "last_sale_date": "2021-06-28",
      "last_price": 108500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/119"
    },
    {
      "paon": "119A",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 2,
      "first_sale_date": "2015-06-19",
      "last_sale_date": "2021-05-07",
      "last_price": 165000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/119a"
    },
    {
      "paon": "122",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 4,
      "first_sale_date": "1995-02-10",
      "last_sale_date": "2004-06-28",
      "last_price": 80000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/122"
    },
    {
      "paon": "123",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 5,
      "first_sale_date": "1999-09-30",
      "last_sale_date": "2025-06-11",
      "last_price": 118000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/123"
    },
    {
      "paon": "124",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "2021-10-08",
      "last_sale_date": "2021-10-08",
      "last_price": 110000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/124"
    },
    {
      "paon": "125",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "1996-05-03",
      "last_sale_date": "1996-05-03",
      "last_price": 35500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/125"
    },
    {
      "paon": "126",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 3,
      "first_sale_date": "1995-04-04",
      "last_sale_date": "2019-10-08",
      "last_price": 110000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/126"
    },
    {
      "paon": "127",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2001-08-20",
      "last_sale_date": "2001-08-20",
      "last_price": 20475,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/127"
    },
    {
      "paon": "128",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 1,
      "first_sale_date": "2010-04-28",
      "last_sale_date": "2010-04-28",
      "last_price": 66500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/128"
    },
    {
      "paon": "129",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 3,
      "first_sale_date": "2002-03-15",
      "last_sale_date": "2022-03-17",
      "last_price": 125000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/129"
    },
    {
      "paon": "130",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 5,
      "first_sale_date": "2001-04-04",
      "last_sale_date": "2023-07-12",
      "last_price": 102000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/130"
    },
    {
      "paon": "132",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 3,
      "first_sale_date": "2001-01-19",
      "last_sale_date": "2016-07-29",
      "last_price": 90000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/132"
    },
    {
      "paon": "134",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 3,
      "first_sale_date": "2003-10-17",
      "last_sale_date": "2016-07-29",
      "last_price": 84000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/134"
    },
    {
      "paon": "135",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 2,
      "first_sale_date": "2004-08-13",
      "last_sale_date": "2016-02-02",
      "last_price": 100000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/135"
    },
    {
      "paon": "136",
      "saon": null,
      "postcode": "HU6 7DL",
      "sale_count": 3,
      "first_sale_date": "1996-01-06",
      "last_sale_date": "2000-04-13",
      "last_price": 30995,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/136"
    },
    {
      "paon": "137",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 3,
      "first_sale_date": "2000-10-27",
      "last_sale_date": "2019-03-01",
      "last_price": 100000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/137"
    },
    {
      "paon": "139",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2018-10-05",
      "last_sale_date": "2018-10-05",
      "last_price": 100000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/139"
    },
    {
      "paon": "140",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 2,
      "first_sale_date": "2002-11-01",
      "last_sale_date": "2013-10-18",
      "last_price": 73500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/140"
    },
    {
      "paon": "142",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 2,
      "first_sale_date": "1995-12-01",
      "last_sale_date": "1999-05-28",
      "last_price": 29500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/142"
    },
    {
      "paon": "144",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "1999-09-24",
      "last_sale_date": "1999-09-24",
      "last_price": 33000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/144"
    },
    {
      "paon": "146",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2003-10-10",
      "last_sale_date": "2003-10-10",
      "last_price": 48000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/146"
    },
    {
      "paon": "147",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2001-12-21",
      "last_sale_date": "2001-12-21",
      "last_price": 26500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/147"
    },
    {
      "paon": "148",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 2,
      "first_sale_date": "1998-09-25",
      "last_sale_date": "2001-02-09",
      "last_price": 23000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/148"
    },
    {
      "paon": "149",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 5,
      "first_sale_date": "2000-10-26",
      "last_sale_date": "2017-07-05",
      "last_price": 70000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/149"
    },
    {
      "paon": "150",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 2,
      "first_sale_date": "1997-05-19",
      "last_sale_date": "2003-10-22",
      "last_price": 59995,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/150"
    },
    {
      "paon": "151",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 7,
      "first_sale_date": "1999-12-17",
      "last_sale_date": "2024-12-02",
      "last_price": 128000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/151"
    },
    {
      "paon": "152",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2020-09-25",
      "last_sale_date": "2020-09-25",
      "last_price": 95800,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/152"
    },
    {
      "paon": "153",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "1996-04-12",
      "last_sale_date": "1996-04-12",
      "last_price": 37000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/153"
    },
    {
      "paon": "154",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 2,
      "first_sale_date": "2012-02-24",
      "last_sale_date": "2021-08-20",
      "last_price": 115000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/154"
    },
    {
      "paon": "156",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "1995-07-28",
      "last_sale_date": "1995-07-28",
      "last_price": 27000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/156"
    },
    {
      "paon": "158",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2024-06-28",
      "last_sale_date": "2024-06-28",
      "last_price": 93500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/158"
    },
    {
      "paon": "159",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2015-02-20",
      "last_sale_date": "2015-02-20",
      "last_price": 60000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/159"
    },
    {
      "paon": "160",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 2,
      "first_sale_date": "2011-03-25",
      "last_sale_date": "2020-09-15",
      "last_price": 83000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/160"
    },
    {
      "paon": "162",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2018-09-07",
      "last_sale_date": "2018-09-07",
      "last_price": 72000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/162"
    },
    {
      "paon": "163",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2012-07-11",
      "last_sale_date": "2012-07-11",
      "last_price": 66000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/163"
    },
    {
      "paon": "164",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 6,
      "first_sale_date": "1999-10-20",
      "last_sale_date": "2017-09-29",
      "last_price": 90000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/164"
    },
    {
      "paon": "166",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 3,
      "first_sale_date": "2006-08-23",
      "last_sale_date": "2020-03-03",
      "last_price": 115000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/166"
    },
    {
      "paon": "167",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 1,
      "first_sale_date": "2003-03-21",
      "last_sale_date": "2003-03-21",
      "last_price": 39150,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/167"
    },
    {
      "paon": "168",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 2,
      "first_sale_date": "1996-06-14",
      "last_sale_date": "2005-11-09",
      "last_price": 75000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/168"
    },
    {
      "paon": "169",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 6,
      "first_sale_date": "2004-12-22",
      "last_sale_date": "2025-04-23",
      "last_price": 110000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/169"
    },
    {
      "paon": "170",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2000-04-28",
      "last_sale_date": "2000-04-28",
      "last_price": 29950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/170"
    },
    {
      "paon": "171",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 2,
      "first_sale_date": "2006-01-26",
      "last_sale_date": "2023-01-09",
      "last_price": 105000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/171"
    },
    {
      "paon": "172",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2000-10-20",
      "last_sale_date": "2000-10-20",
      "last_price": 32500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/172"
    },
    {
      "paon": "173",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 5,
      "first_sale_date": "1996-06-21",
      "last_sale_date": "2025-03-14",
      "last_price": 135000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/173"
    },
    {
      "paon": "174",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 3,
      "first_sale_date": "2000-11-17",
      "last_sale_date": "2017-12-13",
      "last_price": 79000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/174"
    },
    {
      "paon": "176",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 3,
      "first_sale_date": "1998-06-19",
      "last_sale_date": "2025-12-05",
      "last_price": 117000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/176"
    },
    {
      "paon": "177",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 2,
      "first_sale_date": "1999-12-03",
      "last_sale_date": "2001-12-03",
      "last_price": 29950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/177"
    },
    {
      "paon": "178",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 3,
      "first_sale_date": "2023-08-11",
      "last_sale_date": "2024-09-27",
      "last_price": 119500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/178"
    },
    {
      "paon": "184",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 3,
      "first_sale_date": "1999-02-12",
      "last_sale_date": "2019-07-04",
      "last_price": 83000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/184"
    },
    {
      "paon": "185",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 2,
      "first_sale_date": "2001-09-07",
      "last_sale_date": "2016-05-06",
      "last_price": 92000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/185"
    },
    {
      "paon": "186",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2000-11-03",
      "last_sale_date": "2000-11-03",
      "last_price": 33900,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/186"
    },
    {
      "paon": "187",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 4,
      "first_sale_date": "1996-07-22",
      "last_sale_date": "2015-02-20",
      "last_price": 84000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/187"
    },
    {
      "paon": "188",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 2,
      "first_sale_date": "1995-03-10",
      "last_sale_date": "2015-11-13",
      "last_price": 94000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/188"
    },
    {
      "paon": "190",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 3,
      "first_sale_date": "2009-06-26",
      "last_sale_date": "2023-07-24",
      "last_price": 120000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/190"
    },
    {
      "paon": "192",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2015-07-24",
      "last_sale_date": "2015-07-24",
      "last_price": 91500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/192"
    },
    {
      "paon": "193",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 1,
      "first_sale_date": "2020-09-25",
      "last_sale_date": "2020-09-25",
      "last_price": 70000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/193"
    },
    {
      "paon": "195",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 1,
      "first_sale_date": "2003-08-26",
      "last_sale_date": "2003-08-26",
      "last_price": 43000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/195"
    },
    {
      "paon": "198",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 5,
      "first_sale_date": "1999-02-26",
      "last_sale_date": "2022-08-26",
      "last_price": 147500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/198"
    },
    {
      "paon": "200",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 3,
      "first_sale_date": "2001-05-29",
      "last_sale_date": "2022-03-25",
      "last_price": 100000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/200"
    },
    {
      "paon": "201",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 2,
      "first_sale_date": "2002-01-18",
      "last_sale_date": "2006-08-04",
      "last_price": 91000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/201"
    },
    {
      "paon": "202",
      "saon": null,
      "postcode": "HU6 7DN",
      "sale_count": 1,
      "first_sale_date": "2001-12-21",
      "last_sale_date": "2001-12-21",
      "last_price": 26500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/202"
    },
    {
      "paon": "203",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 3,
      "first_sale_date": "2002-07-05",
      "last_sale_date": "2025-06-13",
      "last_price": 103000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/203"
    },
    {
      "paon": "204",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 2,
      "first_sale_date": "2019-05-09",
      "last_sale_date": "2022-01-28",
      "last_price": 127500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/204"
    },
    {
      "paon": "205",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 2,
      "first_sale_date": "2001-10-26",
      "last_sale_date": "2006-10-20",
      "last_price": 89950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/205"
    },
    {
      "paon": "206",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 2,
      "first_sale_date": "2007-07-06",
      "last_sale_date": "2023-08-04",
      "last_price": 119250,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/206"
    },
    {
      "paon": "207",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 1,
      "first_sale_date": "1999-10-22",
      "last_sale_date": "1999-10-22",
      "last_price": 20000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/207"
    },
    {
      "paon": "208",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 3,
      "first_sale_date": "1999-11-26",
      "last_sale_date": "2009-06-12",
      "last_price": 66000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/208"
    },
    {
      "paon": "209",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 2,
      "first_sale_date": "2009-02-20",
      "last_sale_date": "2023-11-17",
      "last_price": 105000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/209"
    },
    {
      "paon": "211",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 3,
      "first_sale_date": "2001-05-17",
      "last_sale_date": "2004-06-30",
      "last_price": 68500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/211"
    },
    {
      "paon": "213",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 2,
      "first_sale_date": "2003-08-01",
      "last_sale_date": "2011-12-09",
      "last_price": 94500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/213"
    },
    {
      "paon": "214",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 1,
      "first_sale_date": "2001-11-30",
      "last_sale_date": "2001-11-30",
      "last_price": 39950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/214"
    },
    {
      "paon": "217",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 2,
      "first_sale_date": "2002-11-08",
      "last_sale_date": "2011-07-08",
      "last_price": 80000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/217"
    },
    {
      "paon": "218",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 1,
      "first_sale_date": "2002-07-26",
      "last_sale_date": "2002-07-26",
      "last_price": 36500,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/218"
    },
    {
      "paon": "219",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 4,
      "first_sale_date": "2011-06-21",
      "last_sale_date": "2025-07-25",
      "last_price": 125000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/219"
    },
    {
      "paon": "220",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 5,
      "first_sale_date": "2000-05-03",
      "last_sale_date": "2022-05-20",
      "last_price": 115000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/220"
    },
    {
      "paon": "221",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 1,
      "first_sale_date": "2002-12-13",
      "last_sale_date": "2002-12-13",
      "last_price": 42000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/221"
    },
    {
      "paon": "223",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 2,
      "first_sale_date": "2006-01-25",
      "last_sale_date": "2019-11-20",
      "last_price": 111000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/223"
    },
    {
      "paon": "224",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 5,
      "first_sale_date": "2000-10-20",
      "last_sale_date": "2022-07-29",
      "last_price": 105000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/224"
    },
    {
      "paon": "225",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 1,
      "first_sale_date": "2003-12-19",
      "last_sale_date": "2003-12-19",
      "last_price": 59995,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/225"
    },
    {
      "paon": "226",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 4,
      "first_sale_date": "1999-02-17",
      "last_sale_date": "2023-08-04",
      "last_price": 125000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/226"
    },
    {
      "paon": "227",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 3,
      "first_sale_date": "2001-10-05",
      "last_sale_date": "2024-01-19",
      "last_price": 145000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/227"
    },
    {
      "paon": "228",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 1,
      "first_sale_date": "1997-05-30",
      "last_sale_date": "1997-05-30",
      "last_price": 32950,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/228"
    },
    {
      "paon": "229",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 3,
      "first_sale_date": "2003-01-17",
      "last_sale_date": "2007-12-07",
      "last_price": 115000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/229"
    },
    {
      "paon": "230",
      "saon": null,
      "postcode": "HU6 7DW",
      "sale_count": 1,
      "first_sale_date": "2007-02-07",
      "last_sale_date": "2007-02-07",
      "last_price": 100000,
      "url": "https://openproperties.uk/hu6/welwyn-park-avenue/230"
    }
  ],
  "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
  }
}