Dilwyn Court, Flat 10, Abercromby Avenue, High Wycombe, HP12 3BH

Dilwyn Court is a one-bedroom end-of-terrace house in High Wycombe (HP12 3BH). It has a recorded floor area of 42 m² (around 452 sq ft), construction records dating it to 1983-1990 and council tax band B. At 42 m² this is the 18th smallest of 20 units on EPC record in Dilwyn Court, where floor areas span 34–54 m². The building's EPC ratings span E to C, with this unit at the bottom. The latest certificate (November 2022) shows an E (score 51), well below the UK norm with real room to improve. Earlier certificates rated it D (April 2009); the latest reading is one band lower. Between certificates, lighting went from Average to Very Good; while wall efficiency dropped from Good to Average and window efficiency dropped from Good to Average. The recommended improvements would lift it to C (score 80), a 2-band jump. Main heating runs on electricity.

Held since January 2007 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. It lags the bulk of the postcode on energy efficiency (less efficient than 89% of similar EPCs). Across 2001–2007, sale prices on this property compounded at 8.8% per year. Today's modelled estimate of £163,000 is 41.7% above the 2007 sale price.