21a, High Street, Seal, Sevenoaks, TN15 0AN

21a is a detached house in Seal, Sevenoaks, Sevenoaks (TN15 0AN). It has a recorded floor area of 67 m² (around 720 sq ft), construction records dating it to before 1900 and council tax band C. At 67 m² this is the smallest unit on EPC record across the building (67–118 m²). The building's EPC ratings span E to D, with this unit at the top. The latest certificate (January 2009) shows a D (score 67), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 74). The latest certificate is from January 2009, so improvements made since then won't be reflected.

Untraded for 17 years, with the last transfer in May 2009. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. At 67 m² it sits well below the postcode median (117 m² across 4 EPCs), making it one of the more compact homes locally. Today's modelled estimate of £357,000 is 19% above the 2009 sale price.