48a, Blackwell End, Potterspury, Towcester, NN12 7QE

48a is a two-bedroom semi-detached house in Potterspury, Towcester, Towcester (NN12 7QE). It has a recorded floor area of 77 m² (around 829 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (July 2021) shows an E (score 53), well below the UK norm with real room to improve. Earlier certificates rated it D (January 2011); the latest reading is one band lower. Between certificates, hot-water efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 83), a 3-band jump.

Held since November 1995 — that's 31 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £241,000 sits 423.9% above the 1995 sale of £46,000. On a £-per-square-foot basis, the last sale (£56/sq ft) was about 71.7% below the postcode norm. It lags the bulk of the postcode on energy efficiency (less efficient than 76% of similar EPCs).