15 Marlborough House, Courtlands, Sheen Road, Richmond, TW10 5AR

15 Marlborough House is a mid-terrace house in Richmond (TW10 5AR). It has a recorded floor area of 97 m² (around 1044 sq ft), construction records dating it to 1930-1949 and council tax band E. At 97 m² this is the 3rd smallest of 9 units on EPC record in the building, where floor areas span 94–120 m². The building's EPC ratings span F to C across 9 units on file. The latest certificate (May 2010) shows a D (score 64), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 76). The latest certificate is from May 2010, so improvements made since then won't be reflected.

Held since August 2010 — that's 16 years off the open market, well above the local norm. Across the public record there are 4 sales, relatively high churn for a single property. Across 1998–2010, sale prices on this property compounded at 10% per year. Today's modelled estimate of £601,000 is 22.7% above the 2010 sale price. On a £-per-square-foot basis, the last sale (£469/sq ft) was about 127.5% above the typical sold price in the postcode.