13a, St Georges Street, Cheltenham, GL50 4AF

13a is a detached house in Cheltenham (GL50 4AF). It has a recorded floor area of 52 m² (around 556 sq ft) and construction records dating it to 2003-2006. The latest certificate (March 2010) returns a B (score 82), comfortably above the UK average. The rating has held steady at B across 2 certificates since May 2009. Between certificates, window efficiency went from Average to Good and lighting went from Average to Very Good. The latest certificate is from March 2010, so improvements made since then won't be reflected. At 52 m² this is the 2nd smallest of 4 units on EPC record in 13a, where floor areas span 44–69 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 (82 versus a worst of 76).

Held since December 2007 — that's 18 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. On energy efficiency it sits in the top 10% of properties in this postcode. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include partial demolition, meaningful when judging how the property has evolved. Across 2007–2007, sale prices on this property compounded at 1.9% per year. Today's modelled estimate of £193,000 is 43% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£243/sq ft) was about 38.1% above the typical sold price in the postcode.