3 Blackwell End, Potterspury, Towcester, NN12 7QE

3 Blackwell End is a semi-detached house in Potterspury, Towcester, Towcester (NN12 7QE). It has a recorded floor area of 56 m² (around 603 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (September 2022) shows a D (score 65), on the cusp of jumping into the C band. When first surveyed in April 2010 the rating was E, the property has climbed 1 band since. Between certificates, window efficiency went from Average to Good, hot-water efficiency went from Average to Good and main heating went from Average to Good; while lighting dropped from Average to Poor. The recommended improvements would lift it to B (score 86), a 2-band jump.

It hasn't traded since May 2010, a hold of 16 years that's notably long for the area. Across 2003–2010, sale prices on this property compounded at 3.6% per year. Today's modelled estimate of £220,000 sits 51.7% above the 2010 sale of £145,000. On a £-per-square-foot basis, the last sale (£241/sq ft) was about 23.8% above the typical sold price in the postcode. At 56 m² it's 25.3% smaller than the typical home in the postcode (75 m² median across 41 EPCs).