11 Lock Keepers Court, Blackweir Terrace, Cardiff, CF10 3EZ

11 Lock Keepers Court is a two-bedroom mid-terrace house in Cardiff (CF10 3EZ). It has a recorded floor area of 61 m² (around 657 sq ft), construction records dating it to 2003-2006 and council tax band E. At 61 m² this is the 6th smallest of 36 units on EPC record in the building, where floor areas span 37–84 m². The building's EPC ratings span D to B, with this unit at the bottom. The latest certificate (August 2021) shows a D (score 61), on the cusp of jumping into the C band. The rating has held steady at D across 3 certificates since September 2009. Between certificates, window efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Very Poor. Main heating runs on electricity.

Held since December 2004 — that's 22 years off the open market, well above the local norm. It lags the bulk of the postcode on energy efficiency (less efficient than 80% of similar EPCs). Today's modelled estimate of £162,000 is 19.1% above the 2004 sale price.