5 Arethusa Quay, Maritime Quarter, Swansea, SA1 3XH

5 Arethusa Quay is a semi-detached house in Maritime Quarter, Swansea, Swansea (SA1 3XH). It has a recorded floor area of 82 m² (around 878 sq ft), construction records dating it to 1983-1990 and council tax band E. At 82 m² this is the largest unit on EPC record across the building (40–82 m²). The building's EPC ratings span E to B, with this unit at the bottom. On EPC score it ranks last in the building (48 versus a best of 81). The latest certificate (June 2011) shows an E (score 48), 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, roof efficiency dropped from Good to Average. The recommended improvements would push it to D (score 56). Main heating runs on electricity. The latest certificate is from June 2011, so improvements made since then won't be reflected.

At 82 m² the property is well over the postcode median (47 m² across 19 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement.