21a, Ashbourne Grove, London, W4 2JH

21a is a mid-terrace house in London (W4 2JH). It has a recorded floor area of 50 m² (around 538 sq ft), construction records dating it to 1900-1929 and council tax band D. At 50 m² this is the smallest unit on EPC record across the building (50–89 m²). The building's EPC ratings span E to C across 8 units on file. The latest certificate (June 2023) shows a D (score 68), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since July 2009. Between certificates, lighting went from Very Poor to Very Good; while window efficiency dropped from Good to Average. The recommended improvements would push it to C (score 75).

At 50 m² it sits well below the postcode median (85 m² across 23 EPCs), making it one of the more compact homes locally. Across 2000–2023, sale prices on this property compounded at 4.5% per year. On a £-per-square-foot basis, the last sale (£1,007/sq ft) was about 123% above the typical sold price in the postcode. Sold September 2023 for £542,050. One historical planning record sits against the property in 2024.