14 Douglas Bader House, 9 Gibson Close, Isleworth, TW7 6NE

14 Douglas Bader House is a one-bedroom semi-detached house in Isleworth (TW7 6NE). It has a recorded floor area of 47 m² (around 503 sq ft) and construction records dating it to 1983-1990. The latest certificate (February 2011) shows a C (score 76), near the top of the C band. The rating has held steady at C across 2 certificates since March 2009. Between certificates, window efficiency went from Average to Good and lighting went from Good to Very Good. Main heating runs on electricity. The latest certificate is from February 2011, so improvements made since then won't be reflected. At 47 m² this is the 7th smallest of 19 units on EPC record in the building, where floor areas span 41–67 m². The building's EPC ratings span E to B across 19 units on file.

It hasn't traded since July 2009, a hold of 17 years that's notably long for the area. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Across 1997–2009, sale prices on this property compounded at 8.2% per year. Today's modelled estimate of £206,000 is 38.3% above the 2009 sale price. On a £-per-square-foot basis, the last sale (£296/sq ft) was about 33.4% above the typical sold price in the postcode.