11 Copper Beech Close, Hemel Hempstead, HP3 0DG

11 Copper Beech Close is a four-bedroom detached house in Hemel Hempstead (HP3 0DG). It has a recorded floor area of 244 m² (around 2626 sq ft), construction records dating it to 1983-1990 and council tax band G. The latest certificate (September 2022) shows an E (score 44), well below the UK norm with real room to improve. Earlier certificates rated it D (November 2020); the latest reading is one band lower. Between certificates, wall efficiency went from Average to Very Good, roof efficiency went from Average to Good and window efficiency went from Average to Good; while hot-water efficiency dropped from Average to Very Poor and main heating dropped from Good to Very Poor. The recommended improvements would lift it to C (score 78), a 2-band jump. Main heating runs on to be used only when there is no heating/hot.

Held since August 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. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2005–2007, sale prices on this property compounded at 13.1% per year. Today's modelled estimate of £1,097,000 sits 94.2% above the 2007 sale of £565,000. On a £-per-square-foot basis, the last sale (£215/sq ft) was about 29.6% below the postcode norm. 6 planning records sit against the property, 5 approved, 1 refused. Past consents include a loft conversion, an extension and a porch, meaningful when judging how the property has evolved.