10a, Queen Street, Chesterfield, S40 4SF

10a is a semi-detached house in Chesterfield (S40 4SF). It has a recorded floor area of 24 m² (around 258 sq ft), construction records dating it to before 1900 and council tax band D. At 24 m² this is the 3rd smallest of 48 units on EPC record in the building, where floor areas span 21–245 m². The building's EPC ratings span F to C, with this unit at the top. The latest certificate (August 2021) shows a C (score 71). When first surveyed in April 2009 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Good and lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Very Good to Poor. Main heating runs on electricity.

It hasn't traded since September 2003, a hold of 23 years that's notably long for the area. At 24 m² it sits well below the postcode median (46 m² across 47 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 85% of similar EPCs). Today's modelled estimate of £212,000 is 49.3% above the 2003 sale price. On a £-per-square-foot basis, the last sale (£550/sq ft) was about 329% above the typical sold price in the postcode. One historical planning record sits against the property in 2007.