31a, Balfour Road, Islington, London, N5 2HB

31a is a mid-terrace house in Islington, London, London (N5 2HB). It has a recorded floor area of 109 m² (around 1173 sq ft) and construction records dating it to 1900-1929. The latest certificate (June 2014) shows a D (score 65), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since January 2009. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Very Poor to Average; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good. The recommended improvements would push it to C (score 76). The latest certificate is from June 2014, so improvements made since then won't be reflected. At 109 m² this is the 12th smallest of 24 units on EPC record in the building, where floor areas span 33–250 m². The building's EPC ratings span E to C across 24 units on file.

Sold November 2023 for £1,185,000. Across the public record there are 4 sales, relatively high churn for a single property. At 109 m² it's 22.5% larger than the typical home in the postcode (89 m² median across 40 EPCs). Across 2005–2023, sale prices on this property compounded at 6.2% per year. On a £-per-square-foot basis, the last sale (£1,010/sq ft) was about 114.4% above the typical sold price in the postcode.