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

30 Flatholm House is a one-bedroom mid-terrace house in Cardiff (CF11 0JB). It has a recorded floor area of 49 m² (around 527 sq ft), construction records dating it to 2003-2006 and council tax band D. The latest certificate (March 2019) shows a C (score 71). Earlier certificates rated it B (October 2008); the latest reading is one band lower. Between certificates, lighting went from Average to Good; while hot-water efficiency dropped from Average to Very Poor and main heating dropped from Poor to Very Poor. The recommended improvements would push it to B (score 84). Main heating runs on electricity. At 49 m² this is the 7th 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 across 46 units on file.

It hasn't traded since December 2003, a hold of 23 years that's notably long for the area. On a £-per-square-foot basis, the last sale (£246/sq ft) was about 15.5% above the typical sold price in the postcode. At 49 m² it's 15.5% smaller than the typical home in the postcode (58 m² median across 45 EPCs).