Flat 4, 73 Semilong Road, Northampton, NN2 6DG

Flat 4 is a one-bedroom mid-terrace house in Northampton (NN2 6DG). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to before 1900 and council tax band A. At 46 m² this is the largest unit on EPC record across the building (33–46 m²). The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (59 versus a best of 71). The latest certificate (April 2019) shows a D (score 59), a step below the typical UK home. When first surveyed in March 2009 the rating was F, the property has climbed 2 bands since. Between certificates, hot-water efficiency went from Poor to Average, lighting went from Very Poor to Very Good and main heating went from Poor to Average. Main heating runs on electricity.

Held since December 2006 — that's 19 years off the open market, well above the local norm. Today's modelled estimate of £109,000 sits 55.7% above the 2006 sale of £70,000.