31a, Mortimer Road, Cardiff, CF11 9JZ

31a is a two-bedroom end-of-terrace house in Cardiff (CF11 9JZ). It has a recorded floor area of 96 m² (around 1033 sq ft), construction records dating it to 2003-2006 and council tax band E. The latest certificate (December 2021) shows a C (score 75), near the top of the C band. When first surveyed in December 2011 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Good, window efficiency went from Very Poor to Average and lighting went from Good to Very Good. The recommended improvements would push it to B (score 87).

Held since July 1999 — that's 27 years off the open market, well above the local norm. 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 £373,000 sits 328.7% above the 1999 sale of £87,000. On a £-per-square-foot basis, the last sale (£84/sq ft) was about 56% below the postcode norm. At 96 m² it's 21.5% larger than the typical home in the postcode (79 m² median across 30 EPCs). Its energy rating outperforms most of the postcode (better than 70% of similar EPCs).