10 Castle Mews, St Thomas Street, Oxford, OX1 1JR

10 Castle Mews is a two-bedroom semi-detached house in Oxford (OX1 1JR). It has a recorded floor area of 68 m² (around 732 sq ft) and construction records dating it to 1991-1995. The latest certificate (August 2019) shows a D (score 57), a step below the typical UK home. The rating has held steady at D across 2 certificates since July 2009. Between certificates, lighting went from Average to Very Good and main heating went from Poor to Average; while hot-water efficiency dropped from Average to Very Poor. The recommended improvements would push it to C (score 69). Main heating runs on electricity. At 68 m² this is the 22nd smallest of 27 units on EPC record in the building, where floor areas span 45–86 m². The building's EPC ratings span E to B across 27 units on file.

It hasn't traded since July 2008, a hold of 18 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Across 1997–2008, sale prices on this property compounded at 6.2% per year. Today's modelled estimate of £418,000 sits 52% above the 2008 sale of £275,000. At 68 m² it's 16.2% larger than the typical home in the postcode (59 m² median across 26 EPCs).