19b, Blaenclydach Street, Cardiff, CF11 7BB

19b is a semi-detached house in Cardiff (CF11 7BB). It has a recorded floor area of 32 m² (around 344 sq ft), construction records dating it to before 1900 and council tax band B. At 32 m² this is the 2nd smallest of 25 units on EPC record in the building, where floor areas span 22–180 m². The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (39 versus a best of 77). The latest certificate (February 2021) shows an E (score 39), well below the UK norm with real room to improve. The rating has held steady at E across 5 certificates since May 2014. Between certificates, lighting went from Average to Very Good; while roof efficiency dropped from Good to Average and hot-water efficiency dropped from Average to Poor. The recommended improvements would lift it to C (score 77), a 2-band jump. Main heating runs on electricity.

Held since February 2008 — that's 18 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 32 m² it sits well below the postcode median (119 m² across 24 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 79% of similar EPCs). Across 1997–2008, sale prices on this property compounded at 17.2% per year. On a £-per-square-foot basis, the last sale (£682/sq ft) was about 400% above the typical sold price in the postcode.