Flat 1, 5 Quadrant Road, Richmond, TW9 1DH

Flat 1 is a mid-terrace house in Richmond (TW9 1DH). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to 1900-1929 and council tax band C. At 46 m² this is the 2nd smallest of 4 units on EPC record in the building, where floor areas span 42–53 m². The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (42 versus a best of 76). The latest certificate (January 2020) shows an E (score 42), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since October 2008. Between certificates, window efficiency went from Very Poor to Good and lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Average to Very Poor and main heating dropped from Poor to Very Poor. The recommended improvements would lift it to C (score 73), a 2-band jump. Main heating runs on electricity.

Untraded for 21 years, with the last transfer in November 2005. Today's modelled estimate of £408,000 sits 79.3% above the 2005 sale of £227,500. On a £-per-square-foot basis, the last sale (£459/sq ft) was about 20.2% below the postcode norm. At 46 m² it's 22.7% smaller than the typical home in the postcode (60 m² median across 12 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 75% of similar EPCs).