Flat 4, 45 Cathedral Road, Cardiff, CF11 9HD

Flat 4 is an end-of-terrace house in Cardiff (CF11 9HD). It has a recorded floor area of 42 m² (around 452 sq ft) and construction records dating it to 1983-1990. At 42 m² this is the 2nd smallest of 13 units on EPC record in the building, where floor areas span 40–71 m². The building's EPC ratings span D to C, with this unit at the bottom. The latest certificate (October 2018) shows a D (score 66), on the cusp of jumping into the C band. Earlier certificates rated it C (November 2008); the latest reading is one band lower. Between certificates, window efficiency went from Very Poor to Average and lighting went from Poor to Average; while hot-water efficiency dropped from Good to Average. The recommended improvements would push it to C (score 75).

Untraded for 28 years, with the last transfer in April 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 £168,000 sits 250% above the 1998 sale of £48,000. On a £-per-square-foot basis, the last sale (£106/sq ft) was about 49.7% below the postcode norm.