Flat 1, 21 Holly Road, Northampton, NN1 4QL

Flat 1 is a one-bedroom mid-terrace house in Northampton (NN1 4QL). It has a recorded floor area of 52 m² (around 560 sq ft) and construction records dating it to before 1900. The latest certificate (November 2018) shows an E (score 48), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 74), a 2-band jump. Main heating runs on electricity.

Held since October 1999 — that's 27 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 £133,000 sits 245.5% above the 1999 sale of £38,500. On a £-per-square-foot basis, the last sale (£69/sq ft) was about 45.4% below the postcode norm. At 52 m² it sits well below the postcode median (153 m² across 33 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 79% of similar EPCs).