20 School Board Lane, Chesterfield, S40 1ER

20 School Board Lane is a one-bedroom mid-terrace house in Chesterfield (S40 1ER). It has a recorded floor area of 46 m² (around 492 sq ft), construction records dating it to 2003-2006 and council tax band A. At 46 m² this is the smallest unit on EPC record across the building (46–104 m²). The building's EPC ratings span E to B, with this unit at the top. On EPC score it ranks first in the building (82 versus a worst of 40). The latest certificate (October 2008) returns a B (score 82), comfortably above the UK average. The latest certificate is from October 2008, so improvements made since then won't be reflected.

Untraded for 17 years, with the last transfer in August 2009. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. At 46 m² it sits well below the postcode median (81 m² across 7 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the top 10% of properties in this postcode. Today's modelled estimate of £107,000 is 38.1% above the 2009 sale price. On a £-per-square-foot basis, the last sale (£158/sq ft) was about 75.1% above the typical sold price in the postcode.