Westgate House, Flat 147, London Road, Isleworth, TW7 4DJ

Westgate House is a mid-terrace house in Isleworth (TW7 4DJ). It has a recorded floor area of 46 m² (around 495 sq ft) and construction records dating it to 2007-2011. The latest certificate (June 2021) shows a C (score 79), near the top of the C band. The rating has held steady at C across 2 certificates since October 2010. Between certificates, window efficiency went from Average to Good and lighting went from Good 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 push it to B (score 88). Main heating runs on electricity. At 46 m² this is the 8th smallest of 49 units on EPC record in Westgate House, where floor areas span 26–76 m². The building's EPC ratings span D to B across 49 units on file.

Untraded for 18 years, with the last transfer in February 2008. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Today's modelled estimate of £254,000 is 25.1% above the 2008 sale price. On a £-per-square-foot basis, the last sale (£410/sq ft) was about 16.5% below the postcode norm.