Grimthorpe House, Flat 46, Percival Street, Islington, London, EC1V 0BS

Grimthorpe House is a one-bedroom end-of-terrace house in Islington, London, London (EC1V 0BS). It has a recorded floor area of 28 m² (around 301 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (February 2020) shows a C (score 70). The rating has held steady at C across 2 certificates since April 2012. Between certificates, lighting went from Poor to Very Good; while wall efficiency dropped from Poor to Very Poor and window efficiency dropped from Good to Average. At 28 m² this is the 3rd smallest of 31 units on EPC record in Grimthorpe House, where floor areas span 26–89 m². The building's EPC ratings span D to B across 31 units on file.

At 28 m² it sits well below the postcode median (52 m² across 30 EPCs), making it one of the more compact homes locally. Across 2007–2012, sale prices on this property compounded at 6.3% per year. Today's modelled estimate of £318,000 is 27.2% above the 2012 sale price. On a £-per-square-foot basis, the last sale (£829/sq ft) was about 131.5% above the typical sold price in the postcode. 14 years since the last transfer (October 2012).