4 Athelstan Walk North, Welwyn Garden City, AL7 3SH

4 Athelstan Walk North is a one-bedroom end-of-terrace house in Welwyn Garden City (AL7 3SH). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to 1983-1990 and council tax band B. The latest certificate (April 2019) shows a C (score 78), near the top of the C band. When first surveyed in May 2009 the rating was D, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Average to Good and main heating went from Average to Good. At 46 m² this is the 5th smallest of 35 units on EPC record in the building, where floor areas span 40–58 m². The building's EPC ratings span D to B across 35 units on file.

Untraded for 26 years, with the last transfer in December 1999. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £207,000 sits 247.9% above the 1999 sale of £59,500. On a £-per-square-foot basis, the last sale (£120/sq ft) was about 46.1% below the postcode norm. At 46 m² it's 16.4% smaller than the typical home in the postcode (55 m² median across 34 EPCs).