Ambassador House, Flat 1, 2 Cavendish Avenue, Harrow, HA1 3RW

Ambassador House is a one-bedroom detached house in Harrow (HA1 3RW). It has a recorded floor area of 51 m² (around 549 sq ft) and council tax band D. At 51 m² this is the 4th smallest of 16 units on EPC record in Ambassador House, where floor areas span 34–79 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 (61 versus a best of 73). The latest certificate (January 2019) shows a D (score 61), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since February 2017. Between certificates, hot-water efficiency went from Very Poor to Poor and main heating went from Very Poor to Average; while window efficiency dropped from Very Good to Average. Main heating runs on electricity: electricity, unspecified tariff.

At 51 m² it's 19% 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 87% of similar EPCs). Last sale on file: £265,000 in July 2019.