3 Pen Y Cwm, Pentyrch, Cardiff, CF15 9PS

3 Pen Y Cwm is a two-bedroom semi-detached house in Pentyrch, Cardiff, Cardiff (CF15 9PS). It has a recorded floor area of 59 m² (around 635 sq ft), construction records dating it to 1950-1966 and council tax band C. At 59 m² this is the smallest unit on EPC record across the building (59–151 m²). The building's EPC ratings span D to C, with this unit at the bottom. Other recorded features include a balcony. The latest certificate (June 2022) shows a D (score 67), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since June 2012. Between certificates, lighting went from Good to Very Good; while wall efficiency dropped from Good to Average. The recommended improvements would push it to C (score 74).

It lags the bulk of the postcode on energy efficiency (less efficient than 71% of similar EPCs). Today's modelled estimate of £170,000 is 36.1% above the 2016 sale price. On a £-per-square-foot basis, the last sale (£197/sq ft) was about 19.5% below the postcode norm. On the market in November 2016 and unlisted since — roughly 10 years.