Flat 4, 43 Semilong Road, Northampton, NN2 6BT

Flat 4 is a mid-terrace house in Northampton (NN2 6BT). It has a recorded floor area of 53 m² (around 570 sq ft), construction records dating it to before 1900 and council tax band A. At 53 m² this is the 3rd smallest of 4 units on EPC record in the building, where floor areas span 35–59 m². The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (48 versus a best of 74). The latest certificate (December 2019) shows an E (score 48), well below the UK norm with real room to improve. The rating has held steady at E across 3 certificates since February 2009. Between certificates, wall efficiency went from Very Poor to Poor, roof efficiency went from Very Poor to Good and lighting went from Poor to Very Good; while window efficiency dropped from Good to Poor and hot-water efficiency dropped from Poor to Very Poor. The recommended improvements would push it to D (score 66). Main heating runs on electricity.

At 53 m² the property is well over the postcode median (41 m² across 38 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 84% of similar EPCs).