21 Carter Close, Swindon, SN25 4AD

21 Carter Close is a two-bedroom semi-detached house in Swindon (SN25 4AD). It has a recorded floor area of 72 m² (around 775 sq ft), construction records dating it to 1996-2002 and council tax band B. At 72 m² this is the 24th smallest of 39 units on EPC record in the building, where floor areas span 42–127 m². The building's EPC ratings span D to B, with this unit at the bottom. The latest certificate (July 2020) shows a D (score 66), on the cusp of jumping into the C band. Earlier certificates rated it C (April 2009); the latest reading is one band lower. Between certificates, hot-water efficiency went from Average to Good and lighting went from Average to Very Good; while roof efficiency dropped from Good to Average. The recommended improvements would push it to C (score 72).

Untraded for 25 years, with the last transfer in October 2001. Today's modelled estimate of £217,000 sits 109.7% above the 2001 sale of £103,500. On a £-per-square-foot basis, the last sale (£134/sq ft) was about 17.2% below the postcode norm. It lags the bulk of the postcode on energy efficiency (less efficient than 82% of similar EPCs).