315a, Harrow Road, Wembley, HA9 6BA

315a is an end-of-terrace house in Wembley (HA9 6BA). It has a recorded floor area of 11 m² (around 118 sq ft), construction records dating it to 1930-1949 and council tax band C. At 11 m² this is the smallest unit on EPC record across the building (11–123 m²). The building's EPC ratings span E to B, with this unit at the bottom. The latest certificate (February 2024) shows an E (score 47), well below the UK norm with real room to improve. Earlier certificates rated it D (December 2017); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Good to Very Poor and main heating dropped from Good to Very Poor. The recommended improvements would lift it to C (score 73), a 2-band jump. Main heating runs on electricity.

Today's modelled estimate of £231,000 is 61.2% below the 2016 sale of £595,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. At 11 m² it sits well below the postcode median (71 m² across 10 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. 5 planning records sit against the property, 3 approved, 2 refused. Past consents include a loft conversion, meaningful when judging how the property has evolved. On the market in January 2016 and unlisted since — roughly 10 years.