15 Derby Street, Blackburn, BB1 5HR

15 Derby Street is a one-bedroom semi-detached house in Blackburn (BB1 5HR). It has a recorded floor area of 76 m² (around 818 sq ft), construction records dating it to 1967-1975 and council tax band A. The latest certificate (April 2016) shows a D (score 60), on the cusp of jumping into the C band. Earlier certificates rated it C (October 2008); the latest reading is one band lower. Between certificates, wall efficiency dropped from Good to Poor and roof efficiency dropped from Poor to Very Poor. The recommended improvements would lift it to B (score 82), a 2-band jump. The latest certificate is from April 2016, so improvements made since then won't be reflected. Records show the property has been extended at some point in its history.

It hasn't traded since September 1998, a hold of 28 years that's notably long for the area. At 76 m² the property is well over the postcode median (57 m² across 9 EPCs), placing it in the larger end of the local stock. 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count. Across 1998–1998, sale prices on this property compounded at 7.2% per year. Today's modelled estimate of £128,000 sits 613.1% above the 1998 sale of £17,950. On a £-per-square-foot basis, the last sale (£22/sq ft) was about 80.3% below the postcode norm. One planning record on file: an extension approved in 2009. Past consents include an extension, meaningful when judging how the property has evolved.