17 Claycroft, Welwyn Garden City, AL7 2DN

17 Claycroft is a two-bedroom end-of-terrace house in Welwyn Garden City (AL7 2DN). It has a recorded floor area of 72 m² (around 775 sq ft), construction records dating it to 1967-1975 and council tax band C. At 72 m² this is the 8th smallest of 16 units on EPC record in the building, where floor areas span 45–76 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (October 2020) shows a C (score 69), just inside the C band. The rating has held steady at C across 2 certificates since September 2009. Between certificates, window efficiency went from Average to Good; while wall efficiency dropped from Average to Poor and hot-water efficiency dropped from Very Good to Good.

It hasn't traded since November 1996, a hold of 29 years that's notably long for the area. 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 £234,000 sits 408.7% above the 1996 sale of £46,000. On a £-per-square-foot basis, the last sale (£59/sq ft) was about 67.7% below the postcode norm.