13b, Market Street, Kettering, NN16 0AH

13b is an end-of-terrace house in Kettering (NN16 0AH). It has a recorded floor area of 75 m² (around 807 sq ft) and construction records dating it to 1900-1929. The latest certificate (August 2015) shows an E (score 42), well below the UK norm with real room to improve. When first surveyed in September 2010 the rating was F, the property has climbed 1 band since. Between certificates, lighting dropped from Good to Average. The recommended improvements would push it to D (score 64). The latest certificate is from August 2015, so improvements made since then won't be reflected. At 75 m² this is the 13th smallest of 17 units on EPC record in the building, where floor areas span 30–106 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 (42 versus a best of 70).

Held since July 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 75 m² the property is well over the postcode median (45 m² across 16 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 81% of similar EPCs). Today's modelled estimate of £151,000 sits 139.7% above the 2000 sale of £63,000. On a £-per-square-foot basis, the last sale (£78/sq ft) was about 55.2% below the postcode norm. One historical planning record sits against the property in 2012.