21a, Abergele Road, Rumney, Cardiff, CF3 1RR

21a is a semi-detached house in Rumney, Cardiff, Cardiff (CF3 1RR). It has a recorded floor area of 141 m² (around 1518 sq ft), construction records dating it to 1976-1982 and council tax band E. The latest certificate (June 2021) shows a D (score 65), on the cusp of jumping into the C band. When first surveyed in March 2010 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Poor to Average and roof efficiency went from Poor to Average; while lighting dropped from Average to Very Poor. The recommended improvements would lift it to B (score 83), a 2-band jump.

At 141 m² the property is well over the postcode median (48 m² across 18 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 78% of similar EPCs). Across 2001–2021, sale prices on this property compounded at 4.8% per year. Today's modelled estimate of £285,000 is 46.9% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£128/sq ft) was about 22% below the postcode norm. Last sale on file: £194,000 in June 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.