11a, St Catherines Road, Southampton, SO18 1LL

11a is a two-bedroom semi-detached house in Southampton (SO18 1LL). It has a recorded floor area of 64 m² (around 689 sq ft), construction records dating it to 1930-1949 and council tax band B. At 64 m² this is the 3rd smallest of 13 units on EPC record in the building, where floor areas span 34–153 m². The building's EPC ratings span D to C, with this unit at the bottom. The latest certificate (February 2020) 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 April 2009. Between certificates, window efficiency went from Very Poor to Average. The recommended improvements would push it to C (score 76).

Across 1995–2020, sale prices on this property compounded at 5.8% per year. Today's modelled estimate of £190,000 is 13.1% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£244/sq ft) was about 63.5% above the typical sold price in the postcode. At 64 m² it's 20% smaller than the typical home in the postcode (80 m² median across 12 EPCs). Last sale on file: £168,000 in December 2020.