Robertson House, Flat 1, 5 Knapp Road, Cheltenham, GL50 3QQ

Robertson House is a semi-detached house in Cheltenham (GL50 3QQ). It has a recorded floor area of 59 m² (around 635 sq ft). At 59 m² this is the largest unit on EPC record across Robertson House (44–59 m²). The building's EPC ratings span C to B, with this unit at the top. On EPC score it ranks first in the building (81 versus a worst of 80). The latest certificate (September 2018) returns a B (score 81), comfortably above the UK average.

Today's modelled estimate of £217,000 is 13.2% below the 2019 sale of £250,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£394/sq ft) was about 196.3% above the typical sold price in the postcode. At 59 m² it's 18% larger than the typical home in the postcode (50 m² median across 51 EPCs). On energy efficiency it sits in the top 10% of properties in this postcode. Last sale on file: £250,000 in January 2019.