17 De Soissons Close, Welwyn Garden City, AL8 6YX

17 De Soissons Close is a two-bedroom semi-detached house in Welwyn Garden City (AL8 6YX). It has a recorded floor area of 49 m² (around 527 sq ft), construction records dating it to 2003-2006 and council tax band C. At 49 m² this is the smallest unit on EPC record across the building (49–103 m²). The building's EPC ratings span C to B, with this unit at the top. Other recorded features include a balcony. The latest certificate (December 2020) returns a B (score 82), comfortably above the UK average. The rating has held steady at B across 2 certificates since May 2010. Between certificates, lighting went from Average to Very Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good.

At 49 m² it's 19.7% smaller than the typical home in the postcode (61 m² median across 17 EPCs). Its energy rating outperforms most of the postcode (better than 71% of similar EPCs). Across 2005–2014, sale prices on this property compounded at 1.3% per year. Today's modelled estimate of £277,000 is 43.5% above the 2014 sale price. On a £-per-square-foot basis, the last sale (£366/sq ft) was about 16.7% above the typical sold price in the postcode. Last sold in August 2014, so it's been off the market for around 12 years.