21a, Park Street, Trowbridge, BA14 0AU

21a is an end-of-terrace house in Trowbridge (BA14 0AU). It has a recorded floor area of 43 m² (around 463 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (December 2014) shows an E (score 54), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 78), a 2-band jump. The latest certificate is from December 2014, so improvements made since then won't be reflected. At 43 m² this is the 4th smallest of 41 units on EPC record in the building, where floor areas span 25–114 m². The building's EPC ratings span F to C across 41 units on file.

It hasn't traded since August 2008, a hold of 18 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 43 m² it sits well below the postcode median (70 m² across 40 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 80% of similar EPCs). Today's modelled estimate of £119,000 is 35.2% above the 2008 sale price. On a £-per-square-foot basis, the last sale (£190/sq ft) was about 16.2% above the typical sold price in the postcode.