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

13 Redwood Close is a one-bedroom semi-detached house in St. Mellons, Cardiff, Cardiff (CF3 0BX). It has a recorded floor area of 37 m² (around 398 sq ft), construction records dating it to 1976-1982 and council tax band A. The latest certificate (January 2018) shows an F (score 26), near the bottom of the EPC scale. Earlier certificates rated it E (October 2011); the latest reading is one band lower. Between certificates, window efficiency dropped from Good to Average and hot-water efficiency dropped from Average to Very Poor. The recommended improvements would lift it to C (score 76), a 3-band jump. Main heating runs on electricity. At 37 m² this is the 5th 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. On EPC score it ranks last in the building (26 versus a best of 74).

Untraded for 20 years, with the last transfer in July 2006. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2002–2006, sale prices on this property compounded at 13.5% per year. Today's modelled estimate of £107,000 is 44.6% above the 2006 sale price. On a £-per-square-foot basis, the last sale (£186/sq ft) was about 25.8% above the typical sold price in the postcode.