231a, Caerleon Road, Newport, NP19 7HA

231a is an end-of-terrace house in Newport (NP19 7HA). It has a recorded floor area of 48 m² (around 517 sq ft) and construction records dating it to before 1900. At 48 m² this is the smallest unit on EPC record across the building (48–136 m²). The building's EPC ratings span E to C, with this unit at the bottom. The latest certificate (September 2013) shows an E (score 49), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since November 2008. Between certificates, window efficiency went from Average to Good and lighting went from Very Poor to Good; while wall efficiency dropped from Poor to Very Poor. The recommended improvements would lift it to C (score 73), a 2-band jump. The latest certificate is from September 2013, so improvements made since then won't be reflected.

Across 2015–2016, sale prices on this property compounded at 19.4% per year. Today's modelled estimate of £117,000 sits 56% above the 2016 sale of £75,000. On a £-per-square-foot basis, the last sale (£145/sq ft) was about 25.5% above the typical sold price in the postcode. At 48 m² it sits well below the postcode median (112 m² across 18 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 83% of similar EPCs). On the market in September 2016 and unlisted since — roughly 10 years.