23 Corners, Welwyn Garden City, AL7 1RL

23 Corners is a mid-terrace house in Welwyn Garden City (AL7 1RL). It has a recorded floor area of 50 m² (around 538 sq ft), construction records dating it to 1967-1975 and council tax band B. At 50 m² this is the 3rd smallest of 20 units on EPC record in the building, where floor areas span 45–70 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (June 2019) shows a C (score 72). When first surveyed in May 2009 the rating was D, the property has climbed 1 band since. Between certificates, roof efficiency went from Poor to Average, hot-water efficiency went from Poor to Average and lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Average. Main heating runs on electricity.

Sale prices here have outpaced England HPI: 3% per year against 0% for the wider region. On a £-per-square-foot basis, the last sale (£347/sq ft) was about 78.6% above the typical sold price in the postcode. At 50 m² it's 18.8% smaller than the typical home in the postcode (62 m² median across 19 EPCs). Last sale on file: £187,000 in February 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.