21 Blackbirds Way, St Mellons, Cardiff, CF3 5RE

21 Blackbirds Way is a three-bedroom end-of-terrace house in St. Mellons, Cardiff, Cardiff (CF3 5RE). It has a recorded floor area of 71 m² (around 764 sq ft), construction records dating it to 1976-1982 and council tax band B. The latest certificate (February 2026) shows a C (score 70). When first surveyed in December 2009 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Average to Good and lighting went from Poor to Average. This certificate was lodged in the last six months, so the rating reflects current condition. Our model identifies extension potential, subject to local planning policy.

Held since October 2006 — that's 20 years off the open market, well above the local norm. Across 1999–2006, sale prices on this property compounded at 40.9% per year. Today's modelled estimate of £115,000 is 40.2% above the 2006 sale price. On a £-per-square-foot basis, the last sale (£107/sq ft) was about 36.2% above the typical sold price in the postcode. At 71 m² it's 18.4% smaller than the typical home in the postcode (87 m² median across 27 EPCs).