Flat 3, 4 High Street, Sutton, SM1 1HN

Flat 3 is a mid-terrace house in Sutton (SM1 1HN). It has a recorded floor area of 30 m² (around 323 sq ft) and construction records dating it to 2020. At 30 m² this is the largest unit on EPC record across the building (18–30 m²). The building's EPC ratings span E to D, with this unit at the bottom. On EPC score it ranks last in the building (45 versus a best of 66). The latest certificate (December 2023) shows an E (score 45), well below the UK norm with real room to improve. Earlier certificates rated it D (May 2018); the latest reading is one band lower. Between certificates, wall efficiency went from Poor to Good, window efficiency went from Very Poor to Average and lighting went from Good to Very Good; while hot-water efficiency dropped from Good to Very Poor and main heating dropped from Good to Very Poor. Main heating runs on electricity: electricity, unspecified tariff.

At 30 m² the property is well over the postcode median (18 m² across 13 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. 3 planning records sit against the property, 1 approved, 2 refused. Past consents include an extension and partial demolition, meaningful when judging how the property has evolved.