12 Duncansby House, Ferry Court, Cardiff, CF11 0AT

12 Duncansby House is a mid-terrace house in Cardiff (CF11 0AT). It has a recorded floor area of 43 m² (around 463 sq ft), construction records dating it to 2007 onwards and council tax band D. The latest certificate (August 2019) returns a high B (score 86), putting the home a stone's throw from an A rating. When first surveyed in February 2011 the rating was C, the property has climbed 1 band since. Between certificates, lighting went from Average to Very Good. Main heating runs on electricity. At 43 m² this is the 15th smallest of 65 units on EPC record in the building, where floor areas span 32–79 m². The building's EPC ratings span E to B, with this unit at the top.

Untraded for 19 years, with the last transfer in January 2008. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. On a £-per-square-foot basis, the last sale (£315/sq ft) was about 21% above the typical sold price in the postcode. At 43 m² it's 28.3% smaller than the typical home in the postcode (60 m² median across 64 EPCs).