17 Northstand Apartments, Highbury Stadium Square, Islington, London, N5 1FJ

17 Northstand Apartments is a mid-terrace house in Islington, London, London (N5 1FJ). It has a recorded floor area of 50 m² (around 538 sq ft), construction records dating it to 2007 onwards and council tax band D. At 50 m² this is the 7th smallest of 71 units on EPC record in the building, where floor areas span 41–100 m². The building's EPC ratings span C to B, with this unit at the bottom. The latest certificate (March 2017) shows a C (score 77), near the top of the C band. Earlier certificates rated it B (October 2008); the latest reading is one band lower. Between certificates, wall efficiency went from Good to Very Good and lighting went from Good to Very Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good.

At 50 m² it's 28.1% smaller than the typical home in the postcode (70 m² median across 70 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 77% of similar EPCs). Today's modelled estimate of £226,000 is 46.8% above the 2017 sale price. On a £-per-square-foot basis, the last sale (£286/sq ft) was about 58.5% below the postcode norm. On the market in July 2017 and unlisted since — roughly 9 years.