Delven House, Flat 6, 12 Delven Lane, Castle Donington, Derby, DE74 2LJ

Delven House is a two-bedroom end-of-terrace house in Castle Donington, Derby, Derby (DE74 2LJ). It has a recorded floor area of 53 m² (around 570 sq ft), construction records dating it to 1900-1929 and council tax band B. At 53 m² this is the largest unit on EPC record across Delven House (25–53 m²). The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (56 versus a best of 74). The latest certificate (November 2018) shows a D (score 56), a step below the typical UK home. The recommended improvements would push it to C (score 78).

Held since July 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. 3 planning records sit against the property, 2 approved, 1 refused. Past consents include subdivision, meaningful when judging how the property has evolved. Today's modelled estimate of £135,000 is 35% above the 2009 sale price. On a £-per-square-foot basis, the last sale (£175/sq ft) was about 26.8% below the postcode norm.