11 Heron Close, Blackburn, BB1 8NU

11 Heron Close is a four-bedroom detached house in Blackburn (BB1 8NU). It has a recorded floor area of 136 m² (around 1464 sq ft), construction records dating it to 1983-1990 and council tax band E. The latest certificate (March 2014) shows a D (score 67), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since June 2013. Between certificates, window efficiency went from Average to Good and hot-water efficiency went from Average to Good; while wall efficiency dropped from Average to Poor and lighting dropped from Average to Poor. The recommended improvements would lift it to B (score 85), 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 April 2006, a hold of 20 years that's notably long for the area. Across 1997–2006, sale prices on this property compounded at 8.6% per year. Today's modelled estimate of £339,000 sits 99.4% above the 2006 sale of £170,000. On a £-per-square-foot basis, the last sale (£116/sq ft) was about 19.2% below the postcode norm. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension and a garage conversion, meaningful when judging how the property has evolved.