15a, Lisbon Road, Southampton, SO15 3DF

15a is a one-bedroom detached house in Southampton (SO15 3DF). It has a recorded floor area of 31 m² (around 338 sq ft) and council tax band A. At 31 m² this is the smallest unit on EPC record across the building (31–102 m²). The building's EPC ratings span F to D, with this unit at the bottom. On EPC score it ranks last in the building (23 versus a best of 65). The latest certificate (October 2009) shows an F (score 23), near the bottom of the EPC scale. The recommended improvements would lift it to D (score 67), a 2-band jump. Main heating runs on electricity. The latest certificate is from October 2009, so improvements made since then won't be reflected.

It hasn't traded since January 2011, a hold of 15 years that's notably long for the area. At 31 m² it sits well below the postcode median (82 m² across 10 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2000–2011, sale prices on this property compounded at 4.9% per year. Today's modelled estimate of £120,000 sits 66.7% above the 2011 sale of £72,000.