1 Bourne Crescent, Northampton, NN5 7JE

1 Bourne Crescent is a three-bedroom mid-terrace house in Northampton (NN5 7JE). It has a recorded floor area of 81 m² (around 872 sq ft), construction records dating it to 1950-1966 and council tax band A. The latest certificate (August 2018) shows a D (score 65), on the cusp of jumping into the C band. When first surveyed in November 2008 the rating was G, the property has climbed 3 bands since. Between certificates, window efficiency went from Average to Good, hot-water efficiency went from Very Poor to Good and lighting went from Poor to Average. The recommended improvements would lift it to B (score 83), a 2-band jump.

Held since January 2009 — that's 17 years off the open market, well above the local norm. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Today's modelled estimate of £186,000 sits 186.2% above the 2009 sale of £65,000. On a £-per-square-foot basis, the last sale (£75/sq ft) was about 44.5% below the postcode norm. It lags the bulk of the postcode on energy efficiency (less efficient than 82% of similar EPCs).