5a, Royal Parade, Richmond, TW9 3QD

5a is a one-bedroom mid-terrace house in Richmond (TW9 3QD). It has a recorded floor area of 57 m² (around 614 sq ft), construction records dating it to 1930-1949 and council tax band D. At 57 m² this is the smallest unit on EPC record across the building (57–144 m²). The building's EPC ratings span E to C, with this unit at the top. The latest certificate (January 2021) shows a C (score 69), just inside the C band. When first surveyed in February 2010 the rating was D, the property has climbed 1 band since. Between certificates, window efficiency went from Very Poor to Poor, hot-water efficiency went from Average to Good and lighting went from Average to Very Good.

Untraded for 19 years, with the last transfer in May 2007. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 57 m² it sits well below the postcode median (83 m² across 11 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the top 10% of properties in this postcode. Today's modelled estimate of £616,000 is 28.3% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£782/sq ft) was about 105.3% above the typical sold price in the postcode.