15a, Millbrook Street, Plasmarl, Swansea, SA6 8JY

15a is an end-of-terrace house in Plasmarl, Swansea, Swansea (SA6 8JY). It has a recorded floor area of 43 m² (around 463 sq ft), construction records dating it to 1900-1929 and council tax band A. At 43 m² this is the smallest unit on EPC record across the building (43–116 m²). The building's EPC ratings span F to C, with this unit at the top. The latest certificate (July 2024) shows a C (score 69), just inside the C band. When first surveyed in September 2009 the rating was D, the property has climbed 1 band since. Between certificates, lighting went from Good to Very Good; while window efficiency dropped from Good to Average and main heating dropped from Very Good to Good.

Untraded for 21 years, with the last transfer in November 2005. Today's modelled estimate of £126,000 sits 53.7% above the 2005 sale of £82,000. On a £-per-square-foot basis, the last sale (£177/sq ft) was about 90.3% above the typical sold price in the postcode. At 43 m² it sits well below the postcode median (75 m² across 23 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 87% of similar EPCs).