4a, Penrhyn Terrace, Bethesda, Bangor, LL57 3NB

4a is an end-of-terrace house in Bethesda, Bangor, Bangor (LL57 3NB). It has a recorded floor area of 53 m² (around 570 sq ft), construction records dating it to 1996-2002 and council tax band A. At 53 m² this is the 17th smallest of 21 units on EPC record in the building, where floor areas span 32–83 m². The building's EPC ratings span F to C, with this unit at the top. The latest certificate (December 2022) shows a C (score 74). When first surveyed in December 2012 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Good; while lighting dropped from Very Good to Average.

Held since March 1998 — that's 28 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 £124,000 sits 726.7% above the 1998 sale of £15,000. On a £-per-square-foot basis, the last sale (£26/sq ft) was about 71.7% below the postcode norm. At 53 m² it's 21.8% larger than the typical home in the postcode (44 m² median across 20 EPCs).