Flat 4, 81 Heathfield Road, Keston, BR2 6BB

Flat 4 is a three-bedroom mid-terrace house in Keston (BR2 6BB). It has a recorded floor area of 113 m² (around 1216 sq ft), construction records dating it to before 1900 and council tax band E. At 113 m² this is the 3rd smallest of 4 units on EPC record in the building, where floor areas span 84–124 m². The building's EPC ratings span D to C, with this unit at the bottom. The latest certificate (September 2020) shows a D (score 68), on the cusp of jumping into the C band. The rating has held steady at D across 3 certificates since October 2008. Between certificates, lighting went from Very Poor to Good. The recommended improvements would lift it to B (score 81), a 2-band jump.

Untraded for 28 years, with the last transfer in December 1997. Across 1996–1997, sale prices on this property compounded at 7.5% per year. Today's modelled estimate of £481,000 sits 406.3% above the 1997 sale of £95,000. On a £-per-square-foot basis, the last sale (£78/sq ft) was about 72.8% below the postcode norm. At 113 m² it's 25.6% smaller than the typical home in the postcode (152 m² median across 11 EPCs).