Northumbria Court, Flat 3, 6 Sheen Road, Richmond, TW9 1AE

Northumbria Court is a two-bedroom mid-terrace house in Richmond (TW9 1AE). It has a recorded floor area of 51 m² (around 549 sq ft) and construction records dating it to 1991-1995. The latest certificate (March 2020) shows a C (score 73). When first surveyed in January 2009 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Average to Good, window efficiency went from Average to Good and hot-water efficiency went from Very Poor to Poor. Main heating runs on electricity. At 51 m² this is the 14th smallest of 30 units on EPC record in Northumbria Court, where floor areas span 38–77 m². The building's EPC ratings span D to B across 30 units on file.

Held since August 2009 — that's 17 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. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Across 1996–2009, sale prices on this property compounded at 8.9% per year. Today's modelled estimate of £410,000 is 20.6% above the 2009 sale price. On a £-per-square-foot basis, the last sale (£619/sq ft) was about 16.4% above the typical sold price in the postcode.