15 Keystone Crescent, Islington, London, N1 9DS

15 Keystone Crescent is a three-bedroom mid-terrace house in Islington, London, London (N1 9DS). It has a recorded floor area of 38 m² (around 409 sq ft), construction records dating it to before 1900 and council tax band D. At 38 m² this is the 2nd smallest of 22 units on EPC record in the building, where floor areas span 33–126 m². The building's EPC ratings span G to C, with this unit at the top. Period features are noted in the property record. The latest certificate (June 2025) shows a C (score 69), just inside the C band. When first surveyed in July 2013 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor and hot-water efficiency went from Average to Good; while window efficiency dropped from Poor to Very Poor.

Sale prices here have outpaced London HPI: 13.9% per year against 0% for the wider region. Today's modelled estimate of £922,000 is 23.2% below the 2013 sale of £1,200,000, an unusual pattern given regional price growth and worth checking against the EPC condition. On a £-per-square-foot basis, the last sale (£2,934/sq ft) was about 317.8% above the typical sold price in the postcode. 6 planning records sit against the property, 2 approved, 4 refused. Past consents include an extension and subdivision, meaningful when judging how the property has evolved. The record references listed-building consent, which constrain future alterations. At 38 m² it sits well below the postcode median (102 m² across 21 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 76% of similar EPCs). 3 bedrooms is on the larger side for this postcode, where 1 is the typical count. Last changed hands 13 years ago, in November 2013.