21c, Cwmgarw Road, Upper Brynamman, Ammanford, SA18 1BY

21c is an end-of-terrace house in Upper Brynamman, Ammanford, Ammanford (SA18 1BY). It has a recorded floor area of 45 m² (around 484 sq ft), construction records dating it to before 1900 and council tax band A. At 45 m² this is the smallest unit on EPC record across the building (45–274 m²). The building's EPC ratings span F to C, with this unit at the top. The latest certificate (April 2024) shows a C (score 74). When first surveyed in June 2009 the rating was F, the property has climbed 3 bands since. Between certificates, wall efficiency went from Very Poor to Good, hot-water efficiency went from Very Poor to Good and main heating went from Poor to Good.

Today's modelled estimate of £129,000 sits 268.6% above the 2022 sale of £35,000. On a £-per-square-foot basis, the last sale (£72/sq ft) was about 23.4% below the postcode norm. At 45 m² it sits well below the postcode median (83 m² across 29 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 72% of similar EPCs). Sold April 2022 for £35,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.