Acqua House, Flat 5, 41 Melliss Avenue, Richmond, TW9 4BY

Acqua House is a two-bedroom semi-detached house in Richmond (TW9 4BY). It has a recorded floor area of 75 m² (around 807 sq ft), construction records dating it to 2003-2006 and council tax band F. At 75 m² this is the 4th smallest of 46 units on EPC record in Acqua House, where floor areas span 55–153 m². The building's EPC ratings span D to B, with this unit at the bottom. On EPC score it ranks last in the building (62 versus a best of 83). The latest certificate (October 2020) shows a D (score 62), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since March 2010. Between certificates, lighting went from Very Poor to Very Good; while window efficiency dropped from Good to Average and main heating dropped from Poor to Very Poor. Main heating runs on electricity.

It hasn't traded since October 2003, a hold of 23 years that's notably long for the area. At 75 m² it's 16.9% smaller than the typical home in the postcode (90 m² median across 45 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £596,000 is 42.2% above the 2003 sale price.