23a, High Street, Rothwell, Kettering, NN14 6AD

23a is a mid-terrace house in Rothwell, Kettering, Kettering (NN14 6AD). It has a recorded floor area of 88 m² (around 947 sq ft), construction records dating it to before 1900 and council tax band C. At 88 m² this is the 15th smallest of 21 units on EPC record in the building, where floor areas span 31–275 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 (41 versus a best of 80). The latest certificate (January 2020) shows an E (score 41), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since January 2009. Between certificates, roof efficiency went from Average to Good, lighting went from Very Poor to Very Good and main heating went from Very Poor to Average; while wall efficiency dropped from Good to Very Poor and window efficiency dropped from Good to Very Poor. The recommended improvements would lift it to C (score 70), a 2-band jump. Main heating runs on electricity.

Across 2021–2023, sale prices on this property compounded at 3.8% per year. Today's modelled estimate of £174,000 is 42.7% below the 2023 sale of £303,888, an unusual pattern given regional price growth and worth checking against the EPC condition. On a £-per-square-foot basis, the last sale (£321/sq ft) was about 106.7% above the typical sold price in the postcode. At 88 m² the property is well over the postcode median (64 m² across 20 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 75% of similar EPCs). Sold February 2023 for £303,888.