25b, Blackheath Grove, London, SE3 0DH

25b is a detached house in London (SE3 0DH). It has a recorded floor area of 62 m² (around 672 sq ft), construction records dating it to 1950-1966 and council tax band C. At 62 m² this is the largest unit on EPC record across the building (54–62 m²). On EPC score it ranks last in the building (69 versus a best of 78). The latest certificate (December 2008) shows a C (score 69), just inside the C band. The recommended improvements would push it to B (score 84). The latest certificate is from December 2008, so improvements made since then won't be reflected.

It hasn't traded since February 2009, a hold of 17 years that's notably long for the area. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Across 1995–2009, sale prices on this property compounded at 9.4% per year. Today's modelled estimate of £356,000 sits 109.4% above the 2009 sale of £170,000. On a £-per-square-foot basis, the last sale (£253/sq ft) was about 38.8% below the postcode norm. At 62 m² it's 15.7% smaller than the typical home in the postcode (74 m² median across 9 EPCs).