Flat 3, 114 Carshalton Road, Sutton, SM1 4RL

Flat 3 is a one-bedroom semi-detached house in Sutton (SM1 4RL). It has a recorded floor area of 40 m² (around 431 sq ft) and construction records dating it to 1900-1929. At 40 m² this is the smallest unit on EPC record across the building (40–71 m²). The building's EPC ratings span G to E, with this unit at the bottom. On EPC score it ranks last in the building (9 versus a best of 46). Other recorded features include a conservatory. The latest certificate (July 2016) shows a G (score 9), near the bottom of the EPC scale. The recommended improvements would lift it to D (score 66), a 3-band jump. Main heating runs on electricity.

On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. On a £-per-square-foot basis, the last sale (£534/sq ft) was about 29.9% above the typical sold price in the postcode. Last sold in June 2017, so it's been off the market for around 9 years.