Walton House, Flat 6, 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 59 m² (around 635 sq ft), construction records dating it to 1967-1975 and council tax band D. At 59 m² this is the smallest unit on EPC record across Walton House (59–73 m²). The building's EPC ratings span D to C, with this unit at the top. The latest certificate (June 2023) shows a C (score 69), just inside the C band. When first surveyed in October 2013 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Poor to Average, roof efficiency went from Average to Good and main heating went from Very Poor to Average. Main heating runs on electricity.

Held since April 2002 — that's 24 years off the open market, well above the local norm. Across 1998–2002, sale prices on this property compounded at 14.7% per year. Today's modelled estimate of £402,000 sits 139.3% above the 2002 sale of £168,000. On a £-per-square-foot basis, the last sale (£265/sq ft) was about 38% below the postcode norm.