{"quality":"Within the building of the matched address closest to the postcode mean","constituency2024":"Welwyn Hatfield","district":"Welwyn Hatfield","ward":"Brookmans Park and Little Heath","wardCode":"E05011058","lsoaName":"Welwyn Hatfield 015C","lsoa":"E01023910","lsoa21Name":"Welwyn Hatfield 015C","lsoa21":"E01023910","county":"Hertfordshire","region":"East of England","country":"England","nationalPark":"","altitude":109,"ruralUrban":"Rural town and fringe","ttwa":"Stevenage and Welwyn Garden City","postTown":"Hatfield","builtUpArea":"Brookmans Park","inUse":"Yes","what3Words":"cove.hiking.pirate","imd":24126,"imdDecile":8,"averageIncome":60700,"predominantPropertyType":"Detached","knownAddresses":["1 Calder Avenue, Brookmans Park","1A Calder Avenue, Brookmans Park","5 Calder Avenue, Brookmans Park","7 Calder Avenue, Brookmans Park","9 Calder Avenue, Brookmans Park","13 Calder Avenue, Brookmans Park","17 Calder Avenue, Brookmans Park","19 Calder Avenue, Brookmans Park","21 Calder Avenue, Brookmans Park","23 Calder Avenue, Brookmans Park","25 Calder Avenue, Brookmans Park","25A Calder Avenue, Brookmans Park","31 Calder Avenue, Brookmans Park","33 Calder Avenue, Brookmans Park","35 Calder Avenue, Brookmans Park","37 Calder Avenue, Brookmans Park","39 Calder Avenue, Brookmans Park","43 Calder Avenue, Brookmans Park","45 Calder Avenue, Brookmans Park","51 Calder Avenue, Brookmans Park","53 Calder Avenue, Brookmans Park"],"busStops":["Mymms Drive (S)","Chancellors School (NE)","Kentish Lane (N)","Kentish Lane (S)","Mymms Drive (N)"],"businesses":["KNUWAY INVESTMENTS LIMITED","TWOWAYS INVESTMENTS LTD","UNIQUELY DRINKS LTD"],"schools":["Chancellor\u0027s School"],"propertySales":[{"address":"9 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2025-11-19T00:00:00","price":1125000},{"address":"9 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2017-10-25T00:00:00","price":1070000},{"address":"43 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2025-03-20T00:00:00","price":1175000},{"address":"43 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2014-06-06T00:00:00","price":850000},{"address":"43 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2007-07-06T00:00:00","price":760000},{"address":"1A Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2021-04-14T00:00:00","price":1100000},{"address":"1A Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2019-10-25T00:00:00","price":925000},{"address":"31 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2019-12-19T00:00:00","price":1015000},{"address":"31 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"1997-05-23T00:00:00","price":267000},{"address":"31 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"1995-03-15T00:00:00","price":170000},{"address":"5 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2019-10-18T00:00:00","price":950000},{"address":"5 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2013-11-28T00:00:00","price":867500},{"address":"5 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2002-07-05T00:00:00","price":405000},{"address":"1 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2019-05-13T00:00:00","price":1500000},{"address":"1 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2016-05-09T00:00:00","price":750000},{"address":"45 Calder Avenue, Brookmans Park","propertyType":"Semi-detached (freehold)","date":"2014-01-16T00:00:00","price":305000},{"address":"19 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2013-12-10T00:00:00","price":1095000},{"address":"19 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2003-12-04T00:00:00","price":705000},{"address":"23 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2013-02-21T00:00:00","price":975000},{"address":"23 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2007-02-28T00:00:00","price":700000},{"address":"17 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2011-10-14T00:00:00","price":725000},{"address":"17 Calder Avenue, Brookmans Park","propertyType":"Detached (freehold)","date":"2002-07-31T00:00:00","price":500000}],"roads":["Calder Avenue"],"population":91,"households":29,"postcode":"AL9 7AH","gridReference":"TL255040","northing":204098,"easting":525599,"latitude":51.721553,"longitude":-0.183107}