20b, Marlborough Road, Richmond, TW10 6JR

20b is a two-bedroom detached house in Richmond (TW10 6JR). It has a recorded floor area of 81 m² (around 872 sq ft) and construction records dating it to before 1900. At 81 m² this is the 10th smallest of 30 units on EPC record in the building, where floor areas span 51–408 m². The building's EPC ratings span E to B across 30 units on file. The latest certificate (September 2020) shows a D (score 61), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 76).

Held since June 1998 — that's 28 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £815,000 sits 191.1% above the 1998 sale of £280,000. On a £-per-square-foot basis, the last sale (£321/sq ft) was about 44.4% below the postcode norm. At 81 m² it's 21.5% smaller than the typical home in the postcode (103 m² median across 29 EPCs).