21 Eddystone House, Ferry Court, Cardiff, CF11 0AU

21 Eddystone House is a property in Cardiff (CF11 0AU). It has a recorded floor area of 65 m² (around 700 sq ft), construction records dating it to 2003-2006 and council tax band E. The latest certificate (June 2026) returns a B (score 82), comfortably above the UK average. When first surveyed in November 2009 the rating was C, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Very Poor to Average, lighting went from Average to Good and main heating went from Very Poor to Poor; while wall efficiency dropped from Very Good to Good and window efficiency dropped from Good to Average. Main heating runs on electricity. This certificate was lodged in the last six months, so the rating reflects current condition. At 65 m² this is the 26th smallest of 35 units on EPC record in the building, where floor areas span 38–95 m². The building's EPC ratings span D to B, with this unit at the top.

Untraded for 17 years, with the last transfer in December 2009. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Its energy rating outperforms most of the postcode (better than 71% of similar EPCs). Today's modelled estimate of £199,000 is 42.1% above the 2009 sale price.