Walton House, Flat 3, Grove Road, Surbiton, KT6 4DB

Walton House is a two-bedroom semi-detached house in Surbiton (KT6 4DB). It has a recorded floor area of 73 m² (around 786 sq ft), construction records dating it to 1950-1966 and council tax band D. At 73 m² this is the largest unit on EPC record across Walton House (59–73 m²). The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (59 versus a best of 73). The latest certificate (July 2023) shows a D (score 59), a step below the typical UK home. When first surveyed in March 2009 the rating was F, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Average and lighting went from Good to Very Good. The recommended improvements would push it to C (score 79). Main heating runs on electricity.

Untraded for 16 years, with the last transfer in July 2010. Today's modelled estimate of £422,000 sits 72.6% above the 2010 sale of £244,550. On a £-per-square-foot basis, the last sale (£311/sq ft) was about 26% below the postcode norm. At 73 m² it's 19.7% larger than the typical home in the postcode (61 m² median across 5 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 80% of similar EPCs).