Flat 3, 39 Addison Road, Waltham Forest, London, E17 9LS

Flat 3 is a detached house in Waltham Forest, London, London (E17 9LS). It has a recorded floor area of 42 m² (around 452 sq ft) and construction records dating it to 1900-1929. At 42 m² this is the smallest unit on EPC record across the building (42–52 m²). The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (46 versus a best of 74). The latest certificate (October 2018) shows an E (score 46), well below the UK norm with real room to improve. Earlier certificates rated it D (December 2008); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Very Good; while roof efficiency dropped from Poor to Very Poor and window efficiency dropped from Good to Average. The recommended improvements would push it to D (score 66).

At 42 m² it sits well below the postcode median (74 m² across 19 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 84% of similar EPCs).