12 Harbour Point, Stuart Street, Cardiff, CF10 5BW

12 Harbour Point is a one-bedroom semi-detached house in Cardiff (CF10 5BW). It has a recorded floor area of 48 m² (around 517 sq ft), construction records dating it to 2007 onwards and council tax band E. The latest certificate (August 2019) returns a high B (score 85), putting the home a stone's throw from an A rating. When first surveyed in June 2009 the rating was E, the property has climbed 3 bands since. Between certificates, hot-water efficiency went from Very Poor to Average and lighting went from Very Poor to Very Good. Main heating runs on electricity. At 48 m² this is the 3rd smallest of 12 units on EPC record in the building, where floor areas span 43–119 m². The building's EPC ratings span D to B, with this unit at the top. On EPC score it ranks first in the building (85 versus a worst of 57).

It hasn't traded since September 2007, a hold of 19 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. At 48 m² it's 27.3% smaller than the typical home in the postcode (66 m² median across 11 EPCs). Its energy rating outperforms most of the postcode (better than 73% of similar EPCs).