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

18 Lock Keepers Court is a one-bedroom end-of-terrace house in Cardiff (CF10 3EZ). It has a recorded floor area of 37 m² (around 398 sq ft), construction records dating it to 2007 onwards and council tax band C. At 37 m² this is the smallest unit on EPC record across the building (37–84 m²). The building's EPC ratings span D to B across 36 units on file. The latest certificate (October 2018) shows a C (score 76), near the top of the C band. The rating has held steady at C across 2 certificates since November 2008. Between certificates, lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Poor to Very Poor and main heating dropped from Poor to Very Poor. Main heating runs on electricity.

At 37 m² it sits well below the postcode median (68 m² across 35 EPCs), making it one of the more compact homes locally. Across 2004–2019, sale prices on this property compounded at 0.7% per year. On a £-per-square-foot basis, the last sale (£276/sq ft) was about 39.1% above the typical sold price in the postcode. Most recent transfer: August 2019 at £110,000.