11 Castles Green, Newcastle Upon Tyne, NE12 6BU

11 Castles Green is a one-bedroom mid-terrace house in Newcastle Upon Tyne (NE12 6BU). It has a recorded floor area of 49 m² (around 527 sq ft), construction records dating it to 1967-1975 and council tax band A. The latest certificate (May 2022) shows an E (score 47), well below the UK norm with real room to improve. When first surveyed in December 2008 the rating was F, the property has climbed 1 band since. Between certificates, wall efficiency went from Poor to Good and lighting went from Very Poor to Very Good; while window efficiency dropped from Good to Average and main heating dropped from Poor to Very Poor. The recommended improvements would lift it to C (score 71), a 2-band jump. Main heating runs on electricity. At 49 m² this is the 9th smallest of 23 units on EPC record in the building, where floor areas span 30–90 m². The building's EPC ratings span F to C across 23 units on file. Records show the property has been extended at some point in its history.

Today's modelled estimate of £104,000 sits 121.3% above the 2011 sale of £47,000. On a £-per-square-foot basis, the last sale (£89/sq ft) was about 25.6% below the postcode norm. On the market in August 2011 and unlisted since — roughly 15 years.