21 Duffryn Close, Cardiff, CF23 6HT

21 Duffryn Close is a three-bedroom detached house in Cardiff (CF23 6HT). It has a recorded floor area of 97 m² (around 1044 sq ft), construction records dating it to 1967-1975 and council tax band E. At 97 m² this is the 17th smallest of 18 units on EPC record in the building, where floor areas span 70–98 m². The building's EPC ratings span E to C across 18 units on file. The latest certificate (January 2013) shows a D (score 64), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 75). The latest certificate is from January 2013, so improvements made since then won't be reflected.

Untraded for 28 years, with the last transfer in November 1998. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £276,000 sits 273% above the 1998 sale of £74,000. On a £-per-square-foot basis, the last sale (£71/sq ft) was about 68% below the postcode norm. 3 planning records sit against the property, 3 approved, 0 refused. Past consents include tree works, meaningful when judging how the property has evolved. At 97 m² it's 29.5% larger than the typical home in the postcode (75 m² median across 17 EPCs).