19 Gaddesden Grove, Welwyn Garden City, AL7 2LW

19 Gaddesden Grove is a one-bedroom mid-terrace house in Welwyn Garden City (AL7 2LW). It has a recorded floor area of 48 m² (around 511 sq ft), construction records dating it to 1967-1975 and council tax band B. At 48 m² this is the 4th smallest of 22 units on EPC record in the building, where floor areas span 47–84 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 (43 versus a best of 79). The latest certificate (July 2011) shows an E (score 43), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 75), a 2-band jump. The latest certificate is from July 2011, so improvements made since then won't be reflected.

Sale prices here have outpaced England HPI: 14.5% per year against 0% for the wider region. On a £-per-square-foot basis, the last sale (£372/sq ft) was about 56.7% above the typical sold price in the postcode. At 48 m² it's 18.1% smaller than the typical home in the postcode (58 m² median across 21 EPCs). 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. Last sold in September 2016, so it's been off the market for around 10 years.