5a, Chesterfield Mews, London, N4 1LH

5a is a mid-terrace house in London (N4 1LH). It has a recorded floor area of 32 m² (around 344 sq ft), construction records dating it to 1900-1929 and council tax band B. At 32 m² this is the 11th smallest of 15 units on EPC record in the building, where floor areas span 17–32 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (October 2025) shows a C (score 69), just inside the C band. When first surveyed in October 2015 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Very Poor to Average; while window efficiency dropped from Good to Poor and hot-water efficiency dropped from Good to Average.

Held since September 2001 — that's 25 years off the open market, well above the local norm. At 32 m² it's 23.1% larger than the typical home in the postcode (26 m² median across 19 EPCs). Today's modelled estimate of £470,000 is 46.9% above the 2001 sale price. On a £-per-square-foot basis, the last sale (£929/sq ft) was about 433.6% above the typical sold price in the postcode.