23 Navigation Way, Blackburn, BB1 1ER

23 Navigation Way is a two-bedroom semi-detached house in Blackburn (BB1 1ER). It has a recorded floor area of 63 m² (around 678 sq ft), construction records dating it to 1983-1990 and council tax band B. The latest certificate (December 2013) shows an E (score 51), well below the UK norm with real room to improve. Earlier certificates rated it C (October 2008); the latest reading is 2 bands lower. Between certificates, lighting went from Very Poor to Good; while roof efficiency dropped from Good to Average and hot-water efficiency dropped from Good to Very Poor. The recommended improvements would lift it to B (score 83), a 3-band jump. The latest certificate is from December 2013, so improvements made since then won't be reflected.

Held since September 2008 — that's 18 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. 2 planning records sit against the property, 1 approved, 1 refused. Past consents include an extension, meaningful when judging how the property has evolved. Across 2002–2008, sale prices on this property compounded at 15.6% per year. Today's modelled estimate of £134,000 is 28.8% above the 2008 sale price. On a £-per-square-foot basis, the last sale (£153/sq ft) was about 60.5% above the typical sold price in the postcode.