17 St James Mansions, Mount Stuart Square, Cardiff, CF10 5LG

17 St James Mansions is a two-bedroom mid-terrace house in Cardiff (CF10 5LG). It has a recorded floor area of 67 m² (around 721 sq ft), construction records dating it to 1996-2002 and council tax band E. At 67 m² this is the 17th smallest of 24 units on EPC record in the building, where floor areas span 39–92 m². The building's EPC ratings span D to B, with this unit at the bottom. The latest certificate (February 2021) shows a D (score 65), on the cusp of jumping into the C band. Earlier certificates rated it C (June 2009); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Good; while hot-water efficiency dropped from Average to Poor. The recommended improvements would push it to C (score 80). Main heating runs on electricity.

Untraded for 22 years, with the last transfer in July 2004. At 67 m² it's 24.1% larger than the typical home in the postcode (54 m² median across 23 EPCs). Across 2002–2004, sale prices on this property compounded at 4.1% per year. Today's modelled estimate of £181,000 is 20.7% above the 2004 sale price.