23a, Balby Road, Doncaster, DN4 0RA

23a is a semi-detached house in Doncaster (DN4 0RA). It has a recorded floor area of 24 m² (around 258 sq ft), construction records dating it to 1900-1929 and council tax band A. At 24 m² this is the smallest unit on EPC record across the building (24–140 m²). The building's EPC ratings span G to D, with this unit at the top. On EPC score it ranks first in the building (66 versus a worst of 4). The latest certificate (November 2015) shows a D (score 66), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since February 2015. Between certificates, window efficiency dropped from Good to Average and lighting dropped from Good to Very Poor. The recommended improvements would push it to C (score 75). The latest certificate is from November 2015, so improvements made since then won't be reflected.

At 24 m² it sits well below the postcode median (111 m² across 4 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the top 10% of properties in this postcode. One planning record on file: subdivision approved in 2008. Past consents include subdivision, meaningful when judging how the property has evolved. Across 1998–2020, sale prices on this property compounded at 8.4% per year. Today's modelled estimate of £121,000 is 28.7% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£364/sq ft) was about 631.1% above the typical sold price in the postcode. Most recent transfer: October 2020 at £94,000.