Flat 4, 21 Hester Street, Northampton, NN2 6AP

Flat 4 is a one-bedroom semi-detached house in Northampton (NN2 6AP). It has a recorded floor area of 53 m² (around 576 sq ft) and construction records dating it to before 1900. At 53 m² this is the largest unit on EPC record across the building (41–53 m²). The building's EPC ratings span F to C, with this unit at the bottom. On EPC score it ranks last in the building (26 versus a best of 69). The latest certificate (December 2008) shows an F (score 26), near the bottom of the EPC scale. Main heating runs on electricity. The latest certificate is from December 2008, so improvements made since then won't be reflected.

Held since April 2000 — that's 26 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. At 53 m² it sits well below the postcode median (141 m² across 26 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £123,000 sits 272.7% above the 2000 sale of £33,000. On a £-per-square-foot basis, the last sale (£57/sq ft) was about 49% below the postcode norm.