9 Clos Derwen, Cardiff, CF23 5HJ

9 Clos Derwen is a three-bedroom detached house in Cardiff (CF23 5HJ). It has a recorded floor area of 160 m² (around 1722 sq ft), construction records dating it to 1996-2002 and council tax band G. The property has underfloor heating on record, all of which lower running costs and tend to lift resale appeal. Other recorded features include a conservatory. The latest certificate (February 2026) shows a C (score 76), near the top of the C band. The rating has held steady at C across 2 certificates since September 2009. Between certificates, roof efficiency went from Good to Very Good and lighting went from Average to Good; while window efficiency dropped from Good to Average. This certificate was lodged in the last six months, so the rating reflects current condition.

At 160 m² the property is well over the postcode median (114 m² across 23 EPCs), placing it in the larger end of the local stock. Across 1999–2014, sale prices on this property compounded at 6.6% per year. Today's modelled estimate of £609,000 sits 64.6% above the 2014 sale of £370,000. On the market in August 2014 and unlisted since — roughly 12 years. Across the public record there are 4 sales, relatively high churn for a single property. 2 planning records sit against the property, 1 approved, 1 refused. Past consents include an extension, meaningful when judging how the property has evolved.