21 Dovercourt House, Ferry Court, Cardiff, CF11 0AS

21 Dovercourt House is a two-bedroom detached house in Cardiff (CF11 0AS). It has a recorded floor area of 75 m² (around 807 sq ft), construction records dating it to 2007 onwards and council tax band E. The latest certificate (September 2019) shows a C (score 77), near the top of the C band. The rating has held steady at C across 2 certificates since May 2009. Between certificates, hot-water efficiency went from Very Poor to Average and lighting went from Poor to Very Good; while wall efficiency dropped from Very Good to Good and window efficiency dropped from Good to Average. The recommended improvements would push it to B (score 81). Main heating runs on electricity. At 75 m² this is the 42nd smallest of 48 units on EPC record in the building, where floor areas span 30–100 m². The building's EPC ratings span D to B across 48 units on file. Other recorded features include a balcony.

Untraded for 17 years, with the last transfer in May 2009. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. At 75 m² the property is well over the postcode median (47 m² across 47 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £190,000 is 31.9% above the 2009 sale price. On a £-per-square-foot basis, the last sale (£178/sq ft) was about 19.6% below the postcode norm.