12 Redwood Close, St Mellons, Cardiff, CF3 0BX

12 Redwood Close is a semi-detached house in St. Mellons, Cardiff, Cardiff (CF3 0BX). It has a recorded floor area of 36 m² (around 388 sq ft), construction records dating it to 1983-1990 and council tax band A. The latest certificate (May 2024) shows an F (score 38), near the bottom of the EPC scale. The rating has held steady at F across 2 certificates since March 2011. Between certificates, wall efficiency went from Average to Good; while window efficiency dropped from Good to Average and lighting dropped from Very Good to Very Poor. The recommended improvements would lift it to C (score 77), a 3-band jump. Main heating runs on electricity. At 36 m² this is the 4th smallest of 14 units on EPC record in the building, where floor areas span 26–60 m². The building's EPC ratings span F to C, with this unit at the bottom.

Untraded for 29 years, with the last transfer in June 1997. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £112,000 sits 388% above the 1997 sale of £22,950. On a £-per-square-foot basis, the last sale (£59/sq ft) was about 60.5% below the postcode norm.