10 The Cloisters, Welwyn Garden City, AL8 6DX

10 The Cloisters is a one-bedroom mid-terrace house in Welwyn Garden City (AL8 6DX). It has a recorded floor area of 30 m² (around 328 sq ft), construction records dating it to 1983-1990 and council tax band B. At 30 m² this is the 5th smallest of 17 units on EPC record in the building, where floor areas span 25–49 m². The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (41 versus a best of 80). The latest certificate (July 2009) shows an E (score 41), well below the UK norm with real room to improve. The recommended improvements would push it to D (score 66). Main heating runs on electricity. The latest certificate is from July 2009, so improvements made since then won't be reflected.

Held since December 2009 — that's 17 years off the open market, well above the local norm. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count. Today's modelled estimate of £177,000 sits 63.6% above the 2009 sale of £108,200. On a £-per-square-foot basis, the last sale (£330/sq ft) was about 34.8% above the typical sold price in the postcode.