15 Havannah Street, Cardiff, CF10 5SF

15 Havannah Street is a one-bedroom detached house in Cardiff (CF10 5SF). It has a recorded floor area of 89 m² (around 957 sq ft), construction records dating it to 2003-2006 and council tax band H. The latest certificate (December 2008) shows an E (score 53), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since December 2008. Between certificates, main heating went from Very Poor to Average. The recommended improvements would push it to D (score 56). Main heating runs on electricity. The latest certificate is from December 2008, so improvements made since then won't be reflected.

It hasn't traded since November 2010, a hold of 16 years that's notably long for the area. At 89 m² the property is well over the postcode median (48 m² across 55 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2003–2010, sale prices on this property compounded at -5% per year. Today's modelled estimate of £341,000 is 26.3% above the 2010 sale price. On a £-per-square-foot basis, the last sale (£282/sq ft) was about 17.4% below the postcode norm.