164a, High Street, Hounslow, TW3 1BQ

164a is a detached house in Hounslow (TW3 1BQ). It has a recorded floor area of 49 m² (around 527 sq ft), construction records dating it to 1950-1966 and council tax band C. At 49 m² this is the 5th smallest of 16 units on EPC record in the building, where floor areas span 29–140 m². The building's EPC ratings span E to A, with this unit at the bottom. The latest certificate (May 2021) shows an E (score 47), well below the UK norm with real room to improve. Earlier certificates rated it C (February 2010); the latest reading is 2 bands lower. Between certificates, window efficiency went from Poor to Average and lighting went from Good to Very Good; while roof efficiency dropped from Good to Poor and hot-water efficiency dropped from Very Good to Very Poor. The recommended improvements would lift it to C (score 76), a 2-band jump. Main heating runs on electricity.

Today's modelled estimate of £656,000 is 11.4% below the 2010 sale of £740,000, running counter to the wider postcode trend, which makes the EPC and condition history especially worth a look. On a £-per-square-foot basis, the last sale (£1,403/sq ft) was about 98% above the typical sold price in the postcode. Held since April 2010 — that's 16 years off the open market, well above the local norm. At 49 m² it's 22.2% smaller than the typical home in the postcode (63 m² median across 15 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 80% of similar EPCs).