17a, Hillside Avenue, Southampton, SO18 1LD

17a is a two-bedroom semi-detached house in Southampton (SO18 1LD). It has a recorded floor area of 53 m² (around 570 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (November 2018) 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 November 2008. Between certificates, wall efficiency dropped from Good to Poor and window efficiency dropped from Good to Average. The recommended improvements would push it to C (score 75). At 53 m² this is the 3rd smallest of 20 units on EPC record in the building, where floor areas span 22–165 m². The building's EPC ratings span E to C across 20 units on file.

Untraded for 21 years, with the last transfer in April 2005. At 53 m² it sits well below the postcode median (102 m² across 19 EPCs), making it one of the more compact homes locally. Across 2001–2005, sale prices on this property compounded at 32.1% per year. Today's modelled estimate of £174,000 is 28.9% above the 2005 sale price. On a £-per-square-foot basis, the last sale (£237/sq ft) was about 38.4% above the typical sold price in the postcode.