Flat 2, 4 Ashburnham Road, Northampton, NN1 4QY

Flat 2 is a one-bedroom mid-terrace house in Northampton (NN1 4QY). It has a recorded floor area of 45 m² (around 484 sq ft) and construction records dating it to before 1900. At 45 m² this is the 2nd smallest of 6 units on EPC record in the building, where floor areas span 40–86 m². The building's EPC ratings span E to D, with this unit at the top. On EPC score it ranks first in the building (66 versus a worst of 52). The latest certificate (January 2019) shows a D (score 66), on the cusp of jumping into the C band. Earlier certificates rated it C (January 2009); the latest reading is one band lower. Between certificates, lighting went from Poor to Average; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good. The recommended improvements would push it to C (score 77).

Untraded for 18 years, with the last transfer in June 2008. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 45 m² it sits well below the postcode median (85 m² across 47 EPCs), making it one of the more compact homes locally. Today's modelled estimate of £125,000 is 13.6% above the 2008 sale price. On a £-per-square-foot basis, the last sale (£227/sq ft) was about 63.9% above the typical sold price in the postcode.