3 Castle Terrace, South Road, Aberystwyth, SY23 1JT

3 Castle Terrace is a mid-terrace house in Aberystwyth (SY23 1JT). It has a recorded floor area of 67 m² (around 721 sq ft), construction records dating it to before 1900 and council tax band C. At 67 m² this is the 5th smallest of 9 units on EPC record in the building, where floor areas span 27–193 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (June 2025) shows a C (score 70). When first surveyed in October 2012 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Good and hot-water efficiency went from Average to Good; while window efficiency dropped from Average to Poor.

Untraded for 30 years, with the last transfer in July 1996. 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 £176,000 sits 193.3% above the 1996 sale of £60,000. On a £-per-square-foot basis, the last sale (£83/sq ft) was about 30.9% above the typical sold price in the postcode. Its energy rating outperforms most of the postcode (better than 75% of similar EPCs).