148a, Chiswick High Road, Hounslow, London, W4 1PR

148a is an end-of-terrace house in Hounslow, London, London (W4 1PR). It has a recorded floor area of 41 m² (around 441 sq ft) and construction records dating it to before 1900. At 41 m² this is the smallest unit on EPC record across the building (41–103 m²). The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (58 versus a best of 74). The latest certificate (February 2017) shows a D (score 58), a step below the typical UK home. When first surveyed in September 2016 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency dropped from Average to Very Poor. The recommended improvements would push it to C (score 72).

At 41 m² it sits well below the postcode median (78 m² across 15 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 73% of similar EPCs). On a £-per-square-foot basis, the last sale (£793/sq ft) was about 67.2% above the typical sold price in the postcode. 9 years since the last transfer (January 2017).