10a, Bridge Street, Penygroes, Llanelli, SA14 7RP

10a is an end-of-terrace house in Penygroes, Llanelli, Llanelli (SA14 7RP). It has a recorded floor area of 37 m² (around 398 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (May 2013) shows an F (score 27), near the bottom of the EPC scale. The recommended improvements would lift it to D (score 56), a 2-band jump. Main heating runs on electricity. The latest certificate is from May 2013, so improvements made since then won't be reflected. At 37 m² this is the 5th smallest of 16 units on EPC record in the building, where floor areas span 22–152 m². The building's EPC ratings span F to B, with this unit at the bottom. On EPC score it ranks last in the building (27 versus a best of 81).

It hasn't traded since December 2002, a hold of 23 years that's notably long for the area. At 37 m² it sits well below the postcode median (72 m² across 15 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £118,000 sits 413% above the 2002 sale of £23,000. On a £-per-square-foot basis, the last sale (£58/sq ft) was about 47.3% below the postcode norm.