Grimthorpe House, Flat 26, Percival Street, Islington, London, EC1V 0BS

Grimthorpe House is a three-bedroom mid-terrace house in Islington, London, London (EC1V 0BS). It has a recorded floor area of 71 m² (around 764 sq ft), construction records dating it to 1930-1949 and council tax band D. The latest certificate (December 2025) shows a C (score 78), near the top of the C band. The rating has held steady at C across 2 certificates since December 2015. Between certificates, lighting went from Poor to Good. The recommended improvements would push it to B (score 82). This certificate was lodged in the last six months, so the rating reflects current condition. At 71 m² this is the 19th 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.

Held since July 2007 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 71 m² the property is well over the postcode median (38 m² across 30 EPCs), placing it in the larger end of the local stock. Across 2002–2007, sale prices on this property compounded at 5.8% per year. Today's modelled estimate of £517,000 sits 91.5% above the 2007 sale of £270,000. On a £-per-square-foot basis, the last sale (£353/sq ft) was about 36.1% below the postcode norm.