23 Royal Sovereign Apartments, Phoebe Road, Copper Quarter, Pentrechwyth, Swansea, SA1 7FH

23 Royal Sovereign Apartments is a one-bedroom mid-terrace house in Pentrechwyth, Swansea, Swansea (SA1 7FH). It has a recorded floor area of 37 m² (around 398 sq ft), construction records dating it to 2007 onwards and council tax band C. The latest certificate (November 2018) returns a B (score 82), comfortably above the UK average. When first surveyed in December 2008 the rating was C, the property has climbed 1 band since. Main heating runs on electricity. At 37 m² this is the 5th smallest of 32 units on EPC record in the building, where floor areas span 36–80 m². The building's EPC ratings span D to B, with this unit at the top.

It hasn't traded since August 2009, a hold of 17 years that's notably long for the area. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Its energy rating outperforms most of the postcode (better than 86% of similar EPCs). On a £-per-square-foot basis, the last sale (£301/sq ft) was about 37.4% above the typical sold price in the postcode.