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

Delven House is a mid-terrace house in Castle Donington, Derby, Derby (DE74 2LJ). It has a recorded floor area of 26 m² (around 280 sq ft), construction records dating it to 1900-1929 and council tax band A. At 26 m² this is the 2nd smallest of 6 units on EPC record in Delven House, where floor areas span 25–53 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (November 2018) shows a C (score 71). The rating has held steady at C across 2 certificates since November 2008. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Very Poor to Poor and lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good.

It hasn't traded since August 2008, a hold of 18 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 26 m² it sits well below the postcode median (51 m² across 12 EPCs), making it one of the more compact homes locally. 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 £120,000 is 41.2% above the 2008 sale price. On a £-per-square-foot basis, the last sale (£304/sq ft) was about 47.5% above the typical sold price in the postcode.