18 St Nicholas Square, Maritime Quarter, Swansea, SA1 1UG

18 St Nicholas Square is a one-bedroom semi-detached house in Maritime Quarter, Swansea, Swansea (SA1 1UG). It has a recorded floor area of 39 m² (around 420 sq ft), construction records dating it to 1983-1990 and council tax band C. At 39 m² this is the smallest unit on EPC record across the building (39–53 m²). The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (63 versus a best of 79). The latest certificate (May 2019) shows a D (score 63), on the cusp of jumping into the C band. Earlier certificates rated it C (September 2008); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Average; while hot-water efficiency dropped from Good to Average. The recommended improvements would push it to C (score 74).

Untraded for 27 years, with the last transfer in February 2000. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £113,000 sits 182.5% above the 2000 sale of £40,000. On a £-per-square-foot basis, the last sale (£95/sq ft) was about 46.8% below the postcode norm.