23 Berwick Place, Welwyn Garden City, AL7 4TU

23 Berwick Place is a two-bedroom mid-terrace house in Welwyn Garden City (AL7 4TU). It has a recorded floor area of 66 m² (around 710 sq ft), construction records dating it to 2003-2006 and council tax band C. The latest certificate (July 2019) returns a B (score 81), comfortably above the UK average. The rating has held steady at B across 2 certificates since July 2009. Between certificates, lighting went from Very Poor to Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good. At 66 m² this is the 29th smallest of 35 units on EPC record in the building, where floor areas span 11–70 m². The building's EPC ratings span D to B, with this unit at the top. The property has solar panels on record, all of which lower running costs and tend to lift resale appeal.

Held since April 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 £254,000 is 49.5% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£239/sq ft) was about 16.5% below the postcode norm.