21 Llansannor Drive, Cardiff, CF10 4BW

21 Llansannor Drive is a one-bedroom semi-detached house in Cardiff (CF10 4BW). It has a recorded floor area of 35 m² (around 377 sq ft), construction records dating it to 1991-1995 and council tax band C. The latest certificate (June 2020) shows an E (score 52), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since January 2009. Between certificates, hot-water efficiency went from Very Poor to Poor; while main heating dropped from Poor to Very Poor. The recommended improvements would push it to D (score 63). Main heating runs on electricity.

At 35 m² it sits well below the postcode median (74 m² across 23 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2008–2014, sale prices on this property compounded at -0.8% per year. Today's modelled estimate of £145,000 sits 52.6% above the 2014 sale of £95,000. On a £-per-square-foot basis, the last sale (£252/sq ft) was about 30.2% above the typical sold price in the postcode. Last sold in October 2014, so it's been off the market for around 12 years.