9b, Marne Road, Southampton, SO18 6AJ

9b is a two-bedroom 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 16 years, with the last transfer in September 2010. Across the public record there are 4 sales, relatively high churn for a single property. Across 1998–2010, sale prices on this property compounded at 10.4% per year. Today's modelled estimate of £161,000 is 23.8% above the 2010 sale price. On a £-per-square-foot basis, the last sale (£151/sq ft) was about 39.1% above the typical sold price in the postcode. At 80 m² it's 29.2% smaller than the typical home in the postcode (113 m² median across 6 EPCs).