Hill Court, 22, St Mark S Hill, Surbiton, KT6 4LW

Hill Court is a three-bedroom semi-detached house in Surbiton (KT6 4LW). It has a recorded floor area of 92 m² (around 990 sq ft), construction records dating it to 1900-1929 and council tax band D. The latest certificate (February 2018) shows a D (score 55), a step below the typical UK home. When first surveyed in October 2008 the rating was F, the property has climbed 2 bands since. Between certificates, window efficiency went from Very Poor to Average, hot-water efficiency went from Average to Good and lighting went from Very Poor to Very Good. The recommended improvements would push it to C (score 78). At 92 m² this is the 13th smallest of 23 units on EPC record in Hill Court, where floor areas span 67–119 m². The building's EPC ratings span E to C across 23 units on file.

Held since June 1996 — that's 30 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £487,000 sits 637.9% above the 1996 sale of £66,000. On a £-per-square-foot basis, the last sale (£67/sq ft) was about 73.9% below the postcode norm.