Flat 4, 51 Warwick Road, London, W5 5PZ

Flat 4 is a one-bedroom mid-terrace house in London (W5 5PZ). It has a recorded floor area of 37 m² (around 398 sq ft), construction records dating it to 1930-1949 and council tax band C. The latest certificate (September 2019) shows a C (score 69), just inside the C band. When first surveyed in April 2009 the rating was E, the property has climbed 2 bands since. Between certificates, hot-water efficiency went from Poor to Good, lighting went from Very Poor to Very Good and main heating went from Average to Good. At 37 m² this is the 2nd smallest of 3 units on EPC record in the building, where floor areas span 21–40 m². On EPC score it ranks last in the building (69 versus a best of 72).

Untraded for 26 years, with the last transfer in October 2000. Across 1998–2000, sale prices on this property compounded at 23% per year. Today's modelled estimate of £308,000 sits 182.6% above the 2000 sale of £109,000. On a £-per-square-foot basis, the last sale (£274/sq ft) was about 49.4% below the postcode norm. At 37 m² it's 24.5% smaller than the typical home in the postcode (49 m² median across 15 EPCs). Its energy rating outperforms most of the postcode (better than 73% of similar EPCs).