3 Alderney House, Ferry Court, Cardiff, CF11 0JT

3 Alderney House is a one-bedroom end-of-terrace house in Cardiff (CF11 0JT). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to 1996-2002 and council tax band D. At 46 m² this is the 3rd smallest of 6 units on EPC record in 3 Alderney House, where floor areas span 42–58 m². The building's EPC ratings span D to B, with this unit at the bottom. On EPC score it ranks last in the building (68 versus a best of 85). Other recorded features include a balcony. The latest certificate (April 2023) shows a D (score 68), on the cusp of jumping into the C band. Earlier certificates rated it C (November 2010); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Very Good; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Average to Poor. The recommended improvements would push it to C (score 80). Main heating runs on electricity.

It hasn't traded since October 2007, a hold of 19 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 46 m² it's 16.4% smaller than the typical home in the postcode (55 m² median across 55 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 89% of similar EPCs). Today's modelled estimate of £115,000 is 48.4% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£157/sq ft) was about 42% below the postcode norm.