Derlwyn Cottage, Alltwalis Road, Alltwalis, Carmarthen, SA32 7DZ

Derlwyn Cottage is a detached house in Alltwalis, Carmarthen, Carmarthen (SA32 7DZ). It has a recorded floor area of 162 m² (around 1744 sq ft), construction records dating it to before 1900 and council tax band F. The latest certificate (August 2025) shows a D (score 68), on the cusp of jumping into the C band. When first surveyed in June 2009 the rating was F, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Very Good, roof efficiency went from Poor to Good and lighting went from Very Poor to Poor; while window efficiency dropped from Average to Poor. The recommended improvements would lift it to B (score 87), a 2-band jump. Main heating runs on electricity.

At 162 m² it's 27.6% larger than the typical home in the postcode (127 m² median across 17 EPCs). Its energy rating outperforms most of the postcode (better than 76% of similar EPCs). Today's modelled estimate of £518,000 is 40.8% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£211/sq ft) was about 44.2% above the typical sold price in the postcode. Most recent transfer: March 2021 at £368,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend. One historical planning record sits against the property in 2024.