21 Duncansby House, Ferry Court, Cardiff, CF11 0AT

21 Duncansby House is a one-bedroom detached house in Cardiff (CF11 0AT). It has a recorded floor area of 42 m² (around 450 sq ft), construction records dating it to 2007 onwards and council tax band D. At 42 m² this is the 9th smallest of 65 units on EPC record in the building, where floor areas span 32–79 m². The building's EPC ratings span E to B across 65 units on file. Other recorded features include a balcony. The latest certificate (November 2010) shows a C (score 74). The recommended improvements would push it to B (score 87). Main heating runs on electricity. The latest certificate is from November 2010, so improvements made since then won't be reflected.

Today's modelled estimate of £127,000 is 14.2% below the 2008 sale of £148,000, an unusual pattern given regional price growth and worth checking against the EPC condition. On a £-per-square-foot basis, the last sale (£329/sq ft) was about 26.9% above the typical sold price in the postcode. Untraded for 18 years, with the last transfer in January 2008. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 42 m² it sits well below the postcode median (60 m² across 64 EPCs), making it one of the more compact homes locally.