18 Heronbridge Close, Westlea, Swindon, SN5 7DR

18 Heronbridge Close is a one-bedroom end-of-terrace house in Westlea, Swindon, Swindon (SN5 7DR). It has a recorded floor area of 31 m² (around 334 sq ft), construction records dating it to 1976-1982 and council tax band A. The latest certificate (March 2018) shows an E (score 53), well below the UK norm with real room to improve. When first surveyed in August 2009 the rating was F, the property has climbed 1 band since. Between certificates, wall efficiency went from Average to Good and window efficiency went from Average to Good. The recommended improvements would lift it to C (score 75), a 2-band jump. Main heating runs on electricity. At 31 m² this is the 3rd smallest of 23 units on EPC record in the building, where floor areas span 30–40 m². The building's EPC ratings span E to C, with this unit at the bottom.

It hasn't traded since October 2005, a hold of 21 years that's notably long for the area. Today's modelled estimate of £117,000 sits 72.1% above the 2005 sale of £68,000. On a £-per-square-foot basis, the last sale (£204/sq ft) was about 15.6% above the typical sold price in the postcode. At 31 m² it's 16.2% smaller than the typical home in the postcode (37 m² median across 22 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 86% of similar EPCs).