4 Castle Lofts, Castle Street, Swansea, SA1 1HF

4 Castle Lofts is a one-bedroom end-of-terrace house in Swansea (SA1 1HF). It has a recorded floor area of 64 m² (around 689 sq ft) and construction records dating it to 2003-2006. The latest certificate (May 2022) returns a B (score 81), comfortably above the UK average. When first surveyed in December 2011 the rating was C, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Good, window efficiency went from Average to Good and lighting went from Very Poor to Very Good. At 64 m² this is the 2nd smallest of 8 units on EPC record in the building, where floor areas span 55–104 m². The building's EPC ratings span D to B, with this unit at the top. On EPC score it ranks first in the building (81 versus a worst of 64).

It hasn't traded since October 2007, a hold of 19 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. On energy efficiency it sits in the top 10% of properties in this postcode. Across 2002–2007, sale prices on this property compounded at 4% per year. Today's modelled estimate of £123,000 is 13.9% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£157/sq ft) was about 41.9% above the typical sold price in the postcode.