21 Flatholm House, Ferry Court, Cardiff, CF11 0JB

21 Flatholm House is a two-bedroom mid-terrace house in Cardiff (CF11 0JB). It has a recorded floor area of 71 m² (around 764 sq ft), construction records dating it to 1996-2002 and council tax band E. There is a swimming pool on the plot, uncommon for the area. At 71 m² this is the 33rd smallest of 46 units on EPC record in the building, where floor areas span 38–88 m². The building's EPC ratings span D to B, with this unit at the bottom. The latest certificate (January 2019) shows a D (score 67), on the cusp of jumping into the C band. Earlier certificates rated it C (December 2008); the latest reading is one band lower. Between certificates, lighting went from Average to Very Good; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Average to Very Poor. The recommended improvements would lift it to B (score 82), a 2-band jump. Main heating runs on electricity.

At 71 m² it's 24.6% larger than the typical home in the postcode (57 m² median across 45 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 87% of similar EPCs). Last sale on file: £165,000 in February 2020.