10 Grove Avenue, New Costessey, Norwich, NR5 0HN

10 Grove Avenue is a two-bedroom semi-detached house in New Costessey, Norwich, Norwich (NR5 0HN). It has a recorded floor area of 71 m² (around 759 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (October 2010) shows an F (score 37), near the bottom of the EPC scale. Earlier certificates rated it E (August 2009); the latest reading is one band lower. Between certificates, roof efficiency went from Average to Good, hot-water efficiency went from Very Poor to Average and lighting went from Average to Very Good; while wall efficiency dropped from Poor to Very Poor and window efficiency dropped from Average to Poor. Main heating runs on electricity. The latest certificate is from October 2010, so improvements made since then won't be reflected. Other recorded features include a conservatory.

At 71 m² it's 20.8% smaller than the typical home in the postcode (89 m² median across 14 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2009–2016, sale prices on this property compounded at -8.9% per year. Today's modelled estimate of £175,000 sits 133.3% above the 2016 sale of £75,000. On a £-per-square-foot basis, the last sale (£99/sq ft) was about 55.9% below the postcode norm. On the market in March 2016 and unlisted since — roughly 10 years.