142a, Chiswick High Road, Hounslow, London, W4 1PU

142a is a mid-terrace house in Hounslow, London, London (W4 1PU). It has a recorded floor area of 131 m² (around 1410 sq ft), construction records dating it to 1900-1929 and council tax band E. The latest certificate (December 2019) shows an E (score 39), well below the UK norm with real room to improve. When first surveyed in April 2009 the rating was G, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Good, window efficiency went from Average to Good and hot-water efficiency went from Very Poor to Poor; while main heating dropped from Poor to Very Poor. The recommended improvements would lift it to C (score 72), a 2-band jump. Main heating runs on electricity. At 131 m² this is the 24th smallest of 27 units on EPC record in the building, where floor areas span 34–170 m². The building's EPC ratings span F to B across 27 units on file.

At 131 m² the property is well over the postcode median (58 m² across 32 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 78% of similar EPCs).