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

14 St James Mansions is a two-bedroom end-of-terrace house in Cardiff (CF10 5LG). It has a recorded floor area of 92 m² (around 990 sq ft), construction records dating it to 2003-2006 and council tax band E. At 92 m² this is the largest unit on EPC record across the building (39–92 m²). The building's EPC ratings span D to B across 24 units on file. The latest certificate (October 2019) shows a C (score 76), near the top of the C band. The rating has held steady at C across 2 certificates since October 2009. Between certificates, lighting went from Very Poor to Very Good; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Average to Poor. The recommended improvements would push it to B (score 81). Main heating runs on electricity.

Untraded for 20 years, with the last transfer in September 2006. At 92 m² the property is well over the postcode median (54 m² across 23 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £180,000 is 21.6% above the 2006 sale price. On a £-per-square-foot basis, the last sale (£149/sq ft) was about 21.1% below the postcode norm.