Marlborough House, Flat 19, Westgate Street, Cardiff, CF10 1DE

Marlborough House is a one-bedroom mid-terrace house in Cardiff (CF10 1DE). It has a recorded floor area of 29 m² (around 312 sq ft), construction records dating it to 1930-1949 and council tax band C. The latest certificate (June 2022) shows an E (score 47), well below the UK norm with real room to improve. Earlier certificates rated it C (May 2010); the latest reading is 2 bands lower. Between certificates, roof efficiency dropped from Poor to Very Poor. The recommended improvements would push it to D (score 62). At 29 m² this is the 2nd smallest of 15 units on EPC record in Marlborough House, where floor areas span 26–90 m². The building's EPC ratings span G to C across 15 units on file.

It hasn't traded since January 2008, a hold of 18 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Across 2000–2008, sale prices on this property compounded at 5.7% per year. Today's modelled estimate of £112,000 sits 69.7% above the 2008 sale of £66,000. At 29 m² it sits well below the postcode median (71 m² across 14 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 79% of similar EPCs).