12 Carshalton Avenue, Portsmouth, PO6 2JT

12 Carshalton Avenue is a five-bedroom semi-detached house in Portsmouth (PO6 2JT). It has a recorded floor area of 113 m² (around 1217 sq ft), construction records dating it to 1930-1949 and council tax band D. The latest certificate (December 2009) shows an E (score 52), well below the UK norm with real room to improve. Earlier certificates rated it D (January 2009); the latest reading is one band lower. Between certificates, window efficiency went from Average to Good and lighting went from Very Poor to Poor; while roof efficiency dropped from Good to Very Poor. The recommended improvements would push it to D (score 60). The latest certificate is from December 2009, so improvements made since then won't be reflected. Other recorded features include a conservatory. Period features are noted in the property record. Our model identifies extension potential, subject to local planning policy.

Held since September 2010 — that's 16 years off the open market, well above the local norm. Across 1999–2010, sale prices on this property compounded at 9.1% per year. Today's modelled estimate of £450,000 sits 57.9% above the 2010 sale of £285,000. On a £-per-square-foot basis, the last sale (£234/sq ft) was about 16.4% below the postcode norm. At 113 m² it's 19.5% larger than the typical home in the postcode (95 m² median across 15 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 73% of similar EPCs). 5 bedrooms is on the larger side for this postcode, where 3 is the typical count.