9a, Marne Road, Southampton, SO18 6AJ

9a is a detached house in Southampton (SO18 6AJ). It has a recorded floor area of 80 m² (around 861 sq ft), construction records dating it to 1967-1975 and council tax band A. The latest certificate (November 2021) shows a D (score 67), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since July 2010. Between certificates, window efficiency went from 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 75). At 80 m² this is the 2nd smallest of 7 units on EPC record in the building, where floor areas span 73–142 m². The building's EPC ratings span E to C across 7 units on file.

Untraded for 28 years, with the last transfer in June 1998. Today's modelled estimate of £167,000 sits 234% above the 1998 sale of £50,000. On a £-per-square-foot basis, the last sale (£58/sq ft) was about 46.5% below the postcode norm. At 80 m² it's 29.2% smaller than the typical home in the postcode (113 m² median across 6 EPCs).