20 Churchfield Avenue, Sawston, Cambridge, CB22 3LA

20 Churchfield Avenue is a three-bedroom semi-detached house in Sawston, Cambridge, Cambridge (CB22 3LA). It has a recorded floor area of 100 m² (around 1076 sq ft), construction records dating it to 1950-1966 and council tax band C. The latest certificate (September 2025) shows an F (score 35), near the bottom of the EPC scale. Earlier certificates rated it D (May 2011); the latest reading is 2 bands lower. Between certificates, wall efficiency went from Poor to Good, roof efficiency went from Poor to Very Good and window efficiency went from Poor to Average; while hot-water efficiency dropped from Good to Average and main heating dropped from Good to Very Poor. The recommended improvements would lift it to C (score 78), a 3-band jump. Main heating runs on to be used only when there is no heating/hot.

At 100 m² it's 19% larger than the typical home in the postcode (84 m² median across 45 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £363,000 sits 96.2% above the 2012 sale of £185,000. On a £-per-square-foot basis, the last sale (£172/sq ft) was about 17% below the postcode norm. 2 planning records sit against the property, 1 approved, 1 refused. Past consents include an extension and partial demolition, meaningful when judging how the property has evolved. 14 years since the last transfer (February 2012).