9 Hanbury Drive, Biggin Hill, Westerham, TN16 3EN

9 Hanbury Drive is a three-bedroom detached house in Biggin Hill, Westerham, Westerham (TN16 3EN). It has a recorded floor area of 172 m² (around 1851 sq ft), construction records dating it to 1950-1966 and council tax band F. The latest certificate (June 2019) shows a D (score 65), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since April 2009. Between certificates, wall efficiency went from Poor to Average and roof efficiency went from Average to Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good. The recommended improvements would push it to C (score 76).

It hasn't traded since August 2009, a hold of 17 years that's notably long for the area. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Today's modelled estimate of £632,000 sits 121% above the 2009 sale of £286,000. On a £-per-square-foot basis, the last sale (£154/sq ft) was about 50.2% below the postcode norm. At 172 m² it's 20.3% larger than the typical home in the postcode (143 m² median across 10 EPCs).