9 Challoners, Horsted Keynes, Haywards Heath, RH17 7DU

9 Challoners is an end-of-terrace house in Horsted Keynes, Haywards Heath, Haywards Heath (RH17 7DU). It has a recorded floor area of 60 m² (around 646 sq ft), construction records dating it to 1967-1975 and council tax band B. At 60 m² this is the 2nd smallest of 12 units on EPC record in the building, where floor areas span 40–130 m². The building's EPC ratings span E to B, with this unit at the bottom. On EPC score it ranks last in the building (53 versus a best of 82). The latest certificate (September 2022) shows an E (score 53), well below the UK norm with real room to improve. Earlier certificates rated it D (October 2009); the latest reading is one band lower. Between certificates, lighting went from Average to Very Good and main heating went from Poor to Average; while wall efficiency dropped from Good to Average and roof efficiency dropped from Average to Very Poor. The recommended improvements would push it to D (score 64). Main heating runs on electricity.

At 60 m² it's 29.4% smaller than the typical home in the postcode (85 m² median across 11 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement.