22 Courtenay Mews, Waltham Forest, London, E17 7PP

22 Courtenay Mews is a semi-detached house in Waltham Forest, London, London (E17 7PP). It has a recorded floor area of 12 m² (around 129 sq ft) and construction records dating it to 1900-1929. At 12 m² this is the smallest unit on EPC record across the building (12–112 m²). The building's EPC ratings span E to C, with this unit at the bottom. The latest certificate (September 2016) shows an E (score 50), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since July 2016. Between certificates, lighting dropped from Good to Average. The recommended improvements would push it to D (score 64).

It hasn't traded since May 2007, a hold of 19 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Today's modelled estimate of £342,000 sits 71% above the 2007 sale of £200,000. On a £-per-square-foot basis, the last sale (£1,548/sq ft) was about 494.6% above the typical sold price in the postcode. At 12 m² it sits well below the postcode median (51 m² across 17 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 71% of similar EPCs).