Grimthorpe House, Flat 76, Percival Street, Islington, London, EC1V 0BP

Grimthorpe House is a one-bedroom end-of-terrace house in Islington, London, London (EC1V 0BP). It has a recorded floor area of 52 m² (around 560 sq ft), construction records dating it to 1950-1966 and council tax band C. At 52 m² this is the smallest unit on EPC record across Grimthorpe House (52–89 m²). The building's EPC ratings span E to B across 19 units on file. Other recorded features include a balcony. Period features are noted in the property record. The latest certificate (December 2020) shows a D (score 67), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since July 2010. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Very Poor to Very Good. The recommended improvements would push it to C (score 75).

Held since January 2011 — that's 15 years off the open market, well above the local norm. Today's modelled estimate of £396,000 sits 68.5% above the 2011 sale of £235,000. At 52 m² it's 20.6% smaller than the typical home in the postcode (66 m² median across 18 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 89% of similar EPCs).