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

21 Athelstan Walk North is a one-bedroom mid-terrace house in Welwyn Garden City (AL7 3SH). It has a recorded floor area of 45 m² (around 484 sq ft), construction records dating it to 1976-1982 and council tax band B. At 45 m² this is the 3rd 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. The latest certificate (October 2018) shows a C (score 75), near the top of the C band.

Held since June 2007 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Today's modelled estimate of £197,000 sits 57.6% above the 2007 sale of £125,000. On a £-per-square-foot basis, the last sale (£258/sq ft) was about 17.8% above the typical sold price in the postcode. At 45 m² it's 18.2% smaller than the typical home in the postcode (55 m² median across 34 EPCs).