Flat 4, 17 Knowsley Road, Southport, PR9 0BN

Flat 4 is a one-bedroom semi-detached house in Southport (PR9 0BN). It has a recorded floor area of 41 m² (around 441 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (March 2014) shows an E (score 54), well below the UK norm with real room to improve. Earlier certificates rated it C (March 2014); the latest reading is 2 bands lower. Between certificates, wall efficiency dropped from Good to Very Poor. The recommended improvements would lift it to A (score 92), a 4-band jump. The latest certificate is from March 2014, so improvements made since then won't be reflected.

It hasn't traded since January 2008, a hold of 19 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. It lags the bulk of the postcode on energy efficiency (less efficient than 71% of similar EPCs). Today's modelled estimate of £114,000 is 11.2% above the 2008 sale price. On a £-per-square-foot basis, the last sale (£232/sq ft) was about 23.4% above the typical sold price in the postcode.