3 Heol Gwys, Upper Cwmtwrch, Swansea, SA9 2XG

3 Heol Gwys is a semi-detached house in Upper Cwmtwrch, Swansea, Swansea (SA9 2XG). It has a recorded floor area of 62 m² (around 667 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (November 2013) shows a D (score 66), on the cusp of jumping into the C band. When first surveyed in March 2013 the rating was F, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Good, roof efficiency went from Good to Very Good and main heating went from Poor to Average; while lighting dropped from Very Good to Good. The recommended improvements would lift it to A (score 92), a 3-band jump. Main heating runs on electricity. The latest certificate is from November 2013, so improvements made since then won't be reflected.

Held since August 1997 — that's 29 years off the open market, well above the local norm. Across 1996–1997, sale prices on this property compounded at 16.3% per year. Today's modelled estimate of £140,000 sits 460% above the 1997 sale of £25,000. At 62 m² it sits well below the postcode median (111 m² across 9 EPCs), making it one of the more compact homes locally.