21 Avebury House, Bentham Close, Westlea, Swindon, SN5 7FS

21 Avebury House is a one-bedroom semi-detached house in Westlea, Swindon, Swindon (SN5 7FS). It has a recorded floor area of 64 m² (around 689 sq ft) and construction records dating it to 2012-2021. At 64 m² this is the 20th smallest of 21 units on EPC record in the building, where floor areas span 34–66 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (November 2025) shows a C (score 72). When first surveyed in November 2015 the rating was E, the property has climbed 2 bands since. Between certificates, hot-water efficiency went from Very Poor to Average and main heating went from Very Poor to Poor; while roof efficiency dropped from Very Good to Good and window efficiency dropped from Very Good to Poor. The recommended improvements would push it to B (score 82). Main heating runs on electricity.

At 64 m² it's 19.6% larger than the typical home in the postcode (54 m² median across 20 EPCs). Its energy rating outperforms most of the postcode (better than 85% of similar EPCs). Today's modelled estimate of £119,000 is 13.3% above the 2016 sale price. On a £-per-square-foot basis, the last sale (£152/sq ft) was about 34.3% below the postcode norm. 10 years since the last transfer (November 2016).