11a, Regent Street, Kettering, NN16 8QG

11a is a one-bedroom mid-terrace house in Kettering (NN16 8QG). It has a recorded floor area of 61 m² (around 656 sq ft) and construction records dating it to 1900-1929. The latest certificate (August 2010) shows an F (score 27), near the bottom of the EPC scale. The recommended improvements would push it to E (score 40). Main heating runs on electricity. The latest certificate is from August 2010, so improvements made since then won't be reflected. At 61 m² this is the 20th smallest of 54 units on EPC record in the building, where floor areas span 34–144 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 (27 versus a best of 80).

At 61 m² it's 23.9% smaller than the typical home in the postcode (80 m² median across 53 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £129,000 sits 72% above the 2011 sale of £75,000. On a £-per-square-foot basis, the last sale (£114/sq ft) was about 19.1% above the typical sold price in the postcode. On the market in July 2011 and unlisted since — roughly 15 years.