23 Chalbury Walk, Islington, London, N1 9SY

23 Chalbury Walk is a three-bedroom semi-detached house in Islington, London, London (N1 9SY). It has a recorded floor area of 74 m² (around 797 sq ft), construction records dating it to 1967-1975 and council tax band D. At 74 m² this is the 16th smallest of 19 units on EPC record in the building, where floor areas span 43–100 m². The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (62 versus a best of 80). The latest certificate (September 2020) shows a D (score 62), on the cusp of jumping into the C band. Earlier certificates rated it C (June 2009); the latest reading is one band lower. Between certificates, roof efficiency dropped from Poor to Very Poor. The recommended improvements would push it to C (score 76).

Held since October 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 74 m² the property is well over the postcode median (46 m² across 18 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 78% of similar EPCs). 3 bedrooms is on the larger side for this postcode, where 1 is the typical count. Today's modelled estimate of £587,000 sits 83.2% above the 2007 sale of £320,500. On a £-per-square-foot basis, the last sale (£402/sq ft) was about 24.6% below the postcode norm.