Penn Court, Flat 6, St Johns Road, Penn, High Wycombe, HP10 8JZ

Penn Court is a detached house in Penn, High Wycombe, High Wycombe (HP10 8JZ). It has a recorded floor area of 60 m² (around 646 sq ft), construction records dating it to 1983-1990 and council tax band D. At 60 m² this is the 6th smallest of 8 units on EPC record in Penn Court, where floor areas span 49–66 m². The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (62 versus a best of 76). The latest certificate (September 2013) shows a D (score 62), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 75). The latest certificate is from September 2013, so improvements made since then won't be reflected.

Held since January 2007 — that's 20 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. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2000–2007, sale prices on this property compounded at 9% per year. Today's modelled estimate of £275,000 sits 57.1% above the 2007 sale of £175,000. On a £-per-square-foot basis, the last sale (£271/sq ft) was about 23.2% below the postcode norm.