11 Heol Callwen, Penycae, Swansea, SA9 1GR

11 Heol Callwen is a semi-detached house in Penycae, Swansea, Swansea (SA9 1GR). It has a recorded floor area of 57 m² (around 614 sq ft), construction records dating it to 1976-1982 and council tax band B. The latest certificate (February 2026) shows a D (score 62), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since June 2012. Between certificates, wall efficiency went from Poor to Average and lighting went from Poor to Very Good; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Good to Average. The recommended improvements would lift it to A (score 93), a 3-band jump. Main heating runs on oil. This certificate was lodged in the last six months, so the rating reflects current condition.

Held since July 2003 — that's 23 years off the open market, well above the local norm. Today's modelled estimate of £159,000 sits 430% above the 2003 sale of £30,000. On a £-per-square-foot basis, the last sale (£49/sq ft) was about 56.6% below the postcode norm. At 57 m² it sits well below the postcode median (82 m² across 9 EPCs), making it one of the more compact homes locally. One historical planning record sits against the property in 2015.