Flat 4, 21 Kingsdowne Road, Surbiton, KT6 6JZ

Flat 4 is a mid-terrace house in Surbiton (KT6 6JZ). It has a recorded floor area of 73 m² (around 786 sq ft), construction records dating it to 1930-1949 and council tax band C. At 73 m² this is the 5th smallest of 6 units on EPC record in the building, where floor areas span 51–106 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (November 2021) shows a C (score 69), just inside the C band. When first surveyed in September 2011 the rating was D, the property has climbed 1 band since. Between certificates, lighting went from Average to Very Good; while window efficiency dropped from Poor to Very Poor and hot-water efficiency dropped from Good to Average. The recommended improvements would push it to B (score 83).

Untraded for 20 years, with the last transfer in December 2005. Across 1995–2005, sale prices on this property compounded at 10.8% per year. Today's modelled estimate of £439,000 sits 75.6% above the 2005 sale of £250,000. At 73 m² it sits well below the postcode median (197 m² across 15 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 73% of similar EPCs).