Flat 2, 21 Carters Avenue, Poole, BH15 4JT

Flat 2 is a semi-detached house in Poole (BH15 4JT). It has a recorded floor area of 70 m² (around 753 sq ft) and construction records dating it to before 1900. The latest certificate (February 2016) shows an E (score 43), well below the UK norm with real room to improve. Earlier certificates rated it D (March 2013); the latest reading is one band lower. Between certificates, wall efficiency dropped from Poor to Very Poor and roof efficiency dropped from Good to Very Poor. The latest certificate is from February 2016, so improvements made since then won't be reflected.

Held since July 2007 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 70 m² it's 15.2% smaller than the typical home in the postcode (83 m² median across 24 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 79% of similar EPCs). Today's modelled estimate of £183,000 is 46.4% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£166/sq ft) was about 24.4% below the postcode norm.