15 Waterloo Road, Cardiff, CF23 5AD

15 Waterloo Road is a mid-terrace house in Cardiff (CF23 5AD). It has a recorded floor area of 63 m² (around 678 sq ft), construction records dating it to before 1900 and council tax band D. At 63 m² this is the smallest unit on EPC record across the building (63–170 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 (52 versus a best of 73). The latest certificate (May 2018) shows an E (score 52), well below the UK norm with real room to improve. Earlier certificates rated it D (September 2009); the latest reading is one band lower. Between certificates, window efficiency went from Very Poor to Poor, hot-water efficiency went from Poor to Average and main heating went from Average to Good; while roof efficiency dropped from Good to Very Poor and lighting dropped from Good to Poor. The recommended improvements would lift it to C (score 74), a 2-band jump.

It hasn't traded since October 2010, a hold of 16 years that's notably long for the area. At 63 m² it sits well below the postcode median (146 m² across 5 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. One planning record on file: subdivision approved in 2018. Past consents include subdivision, meaningful when judging how the property has evolved. Across 2002–2010, sale prices on this property compounded at 5.8% per year. Today's modelled estimate of £202,000 is 24.3% above the 2010 sale price. On a £-per-square-foot basis, the last sale (£240/sq ft) was about 59.1% above the typical sold price in the postcode.