Flat 1, 35 Eccleston Square, London, SW1V 1PB

Flat 1 is a mid-terrace house in London (SW1V 1PB). It has a recorded floor area of 80 m² (around 861 sq ft), construction records dating it to 1900-1929 and council tax band F. At 80 m² this is the largest unit on EPC record across the building (62–80 m²). The building's EPC ratings span F to C, with this unit at the top. On EPC score it ranks first in the building (71 versus a worst of 21). The latest certificate (August 2018) shows a C (score 71).

Untraded for 17 years, with the last transfer in August 2009. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Across 2007–2009, sale prices on this property compounded at 4.7% per year. Today's modelled estimate of £834,000 sits 51.6% above the 2009 sale of £550,000. On a £-per-square-foot basis, the last sale (£639/sq ft) was about 16% above the typical sold price in the postcode. At 80 m² it's 23.1% larger than the typical home in the postcode (65 m² median across 15 EPCs). Its energy rating outperforms most of the postcode (better than 73% of similar EPCs).