20 Marle Close, Pentwyn, Cardiff, CF23 7EP

20 Marle Close is a semi-detached house in Pentwyn, Cardiff, Cardiff (CF23 7EP). It has a recorded floor area of 58 m² (around 624 sq ft), construction records dating it to 2003-2006 and council tax band D. At 58 m² this is the 2nd smallest of 41 units on EPC record in the building, where floor areas span 57–131 m². The building's EPC ratings span D to B, with this unit at the bottom. On EPC score it ranks last in the building (66 versus a best of 85). The latest certificate (February 2013) shows a D (score 66), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 82), a 2-band jump. Main heating runs on electricity. The latest certificate is from February 2013, so improvements made since then won't be reflected.

It hasn't traded since February 2006, a hold of 20 years that's notably long for the area. At 58 m² it's 18.9% smaller than the typical home in the postcode (72 m² median across 40 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £151,000 is 11.9% above the 2006 sale price. On a £-per-square-foot basis, the last sale (£216/sq ft) was about 22% above the typical sold price in the postcode.