Flat 4, 45 Effingham Road, Long Ditton, Surbiton, KT6 5JZ

Flat 4 is a mid-terrace house in Long Ditton, Surbiton, Surbiton (KT6 5JZ). It has a recorded floor area of 40 m² (around 431 sq ft), construction records dating it to 1900-1929 and council tax band C. At 40 m² this is the 2nd smallest of 4 units on EPC record in the building, where floor areas span 38–79 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 (60 versus a best of 71). The latest certificate (January 2019) shows a D (score 60), on the cusp of jumping into the C band. Earlier certificates rated it C (February 2009); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Average; while wall efficiency dropped from Good to Very Poor and hot-water efficiency dropped from Very Good to Good. The recommended improvements would push it to C (score 76).

It hasn't traded since March 2003, a hold of 23 years that's notably long for the area. At 40 m² it sits well below the postcode median (73 m² across 30 EPCs), making it one of the more compact homes locally. On a £-per-square-foot basis, the last sale (£1,858/sq ft) was about 518.4% above the typical sold price in the postcode.