23b, Middle Road, Denham, Uxbridge, UB9 5EG

23b is a detached house in Denham, Uxbridge, Uxbridge (UB9 5EG). It has a recorded floor area of 98 m² (around 1059 sq ft), construction records dating it to 1950-1966 and council tax band F. The latest certificate (March 2011) shows an E (score 41), well below the UK norm with real room to improve. Earlier certificates rated it D (October 2008); the latest reading is one band lower. Between certificates, wall efficiency went from Poor to Good and window efficiency went from Average to Good; while roof efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Poor. The recommended improvements would push it to D (score 59). The latest certificate is from March 2011, so improvements made since then won't be reflected.

Untraded for 29 years, with the last transfer in September 1997. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £575,000 sits 271% above the 1997 sale of £155,000. On a £-per-square-foot basis, the last sale (£146/sq ft) was about 57.3% below the postcode norm. At 98 m² it's 22.7% smaller than the typical home in the postcode (127 m² median across 30 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 70% of similar EPCs).