25a, Arkwright Road, Camden, London, NW3 6AA

25a is a mid-terrace house in Camden, London, London (NW3 6AA). It has a recorded floor area of 24 m² (around 258 sq ft), construction records dating it to 1900-1929 and council tax band G. The latest certificate (June 2019) 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 August 2009. Between certificates, wall efficiency went from Very Poor to Good, roof efficiency went from Very Poor to Average and window efficiency went from Very Poor to Good; while main heating dropped from Good to Very Poor. The recommended improvements would push it to C (score 74). Main heating runs on electricity. At 24 m² this is the 2nd smallest of 38 units on EPC record in the building, where floor areas span 21–286 m². The building's EPC ratings span E to C across 38 units on file.

Untraded for 30 years, with the last transfer in October 1996. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £460,000 sits 212.9% above the 1996 sale of £147,000. On a £-per-square-foot basis, the last sale (£569/sq ft) was about 42.9% below the postcode norm. At 24 m² it sits well below the postcode median (82 m² across 56 EPCs), making it one of the more compact homes locally.