10 Allen Close, Old St Mellons, Cardiff, CF3 5DH

10 Allen Close is a four-bedroom detached house in Old St. Mellons, Cardiff, Cardiff (CF3 5DH). It has a recorded floor area of 114 m² (around 1227 sq ft), construction records dating it to 1996-2002 and council tax band F. The latest certificate (March 2014) shows a D (score 62), on the cusp of jumping into the C band. Earlier certificates rated it C (June 2010); the latest reading is one band lower. Between certificates, wall efficiency dropped from Good to Average and lighting dropped from Very Good to Average. The recommended improvements would lift it to B (score 83), a 2-band jump. The latest certificate is from March 2014, so improvements made since then won't be reflected.

It hasn't traded since December 1997, a hold of 28 years that's notably long for the area. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £424,000 sits 285.5% above the 1997 sale of £110,000. On a £-per-square-foot basis, the last sale (£90/sq ft) was about 36.8% below the postcode norm. At 114 m² it's 26.7% larger than the typical home in the postcode (90 m² median across 24 EPCs).