34d, Onslow Road, Richmond, TW10 6QE

34d is a detached house in Richmond (TW10 6QE). It has a recorded floor area of 69 m² (around 743 sq ft) and construction records dating it to before 1900. At 69 m² this is the 8th smallest of 19 units on EPC record in the building, where floor areas span 26–305 m². The building's EPC ratings span E to C, with this unit at the bottom. The latest certificate (November 2018) shows an E (score 51), well below the UK norm with real room to improve. Earlier certificates rated it D (October 2008); the latest reading is one band lower. The recommended improvements would lift it to C (score 76), a 2-band jump.

Held since November 1999 — that's 27 years off the open market, well above the local norm. Across 1997–1999, sale prices on this property compounded at 12.4% per year. Today's modelled estimate of £686,000 sits 185.8% above the 1999 sale of £240,000. On a £-per-square-foot basis, the last sale (£323/sq ft) was about 42.7% below the postcode norm. At 69 m² it's 15.9% smaller than the typical home in the postcode (82 m² median across 18 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 72% of similar EPCs).