5 Keystone Crescent, Islington, London, N1 9DS

5 Keystone Crescent is a mid-terrace house in Islington, London, London (N1 9DS). It has a recorded floor area of 50 m² (around 538 sq ft), construction records dating it to 1930-1949 and council tax band D. The latest certificate (January 2026) shows a C (score 72). The rating has held steady at C across 3 certificates since February 2016. Between certificates, lighting went from Very Poor to Good; while wall efficiency dropped from Good to Very Poor. This certificate was lodged in the last six months, so the rating reflects current condition.

Today's modelled estimate of £459,000 is 56.7% below the 2017 sale of £1,060,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£1,970/sq ft) was about 202.6% above the typical sold price in the postcode. At 50 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). 2 planning records sit against the property, 2 approved, 0 refused. Past consents include tree works, meaningful when judging how the property has evolved. On the market in December 2017 and unlisted since — roughly 8 years.