17a, Brompton Road, Sprotbrough, Doncaster, DN5 7LB

17a is a detached house in Sprotbrough, Doncaster, Doncaster (DN5 7LB). It has a recorded floor area of 93 m² (around 1001 sq ft), construction records dating it to 1930-1949 and council tax band D. The latest certificate (December 2014) shows a D (score 60), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since December 2012. Between certificates, window efficiency went from Average to Good and lighting went from Good to Very Good; while wall efficiency dropped from Good to Poor and roof efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 83), a 2-band jump. The latest certificate is from December 2014, so improvements made since then won't be reflected.

At 93 m² it sits well below the postcode median (143 m² across 17 EPCs), making it one of the more compact homes locally. Across 2003–2013, sale prices on this property compounded at 4.8% per year. Today's modelled estimate of £337,000 is 34.8% above the 2013 sale price. On a £-per-square-foot basis, the last sale (£250/sq ft) was about 30.9% above the typical sold price in the postcode. Last sold in June 2013, so it's been off the market for around 13 years.