3b, Brooks Road, London, W4 3BJ

3b is a semi-detached house in London (W4 3BJ). It has a recorded floor area of 50 m² (around 538 sq ft), construction records dating it to 1900-1929 and council tax band C. At 50 m² this is the smallest unit on EPC record across the building (50–72 m²). The building's EPC ratings span D to C, with this unit at the bottom. The latest certificate (December 2018) shows a D (score 66), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 79).

It hasn't traded since April 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. Today's modelled estimate of £391,000 sits 81.9% above the 2009 sale of £215,000. On a £-per-square-foot basis, the last sale (£399/sq ft) was about 18.4% below the postcode norm. At 50 m² it's 23.1% smaller than the typical home in the postcode (65 m² median across 15 EPCs).