Flat 5, 15 Effingham Road, Long Ditton, Surbiton, KT6 5JZ

Flat 5 is a one-bedroom semi-detached house in Long Ditton, Surbiton, Surbiton (KT6 5JZ). It has a recorded floor area of 62 m² (around 667 sq ft), construction records dating it to 1900-1929 and council tax band C. At 62 m² this is the largest unit on EPC record across the building (31–62 m²). The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (54 versus a best of 75). The latest certificate (October 2020) shows an E (score 54), well below the UK norm with real room to improve. The rating has held steady at E across 3 certificates since October 2008. Between certificates, hot-water efficiency went from Very Poor to Good, lighting went from Very Poor to Good and main heating went from Very Poor to Good; while wall efficiency dropped from Good to Very Poor and roof efficiency dropped from Average to Very Poor. The recommended improvements would push it to D (score 60).

It hasn't traded since July 2006, a hold of 20 years that's notably long for the area. Across 2004–2006, sale prices on this property compounded at 10.9% per year. Today's modelled estimate of £336,000 sits 63.9% above the 2006 sale of £204,950. It lags the bulk of the postcode on energy efficiency (less efficient than 77% of similar EPCs).