20 Chalford Flats, Northcroft, Wooburn Green, High Wycombe, HP10 0BS

20 Chalford Flats is a mid-terrace house in Wooburn Green, High Wycombe, High Wycombe (HP10 0BS). It has a recorded floor area of 64 m² (around 689 sq ft), construction records dating it to 1967-1975 and council tax band C. At 64 m² this is the 25th smallest of 28 units on EPC record in the building, where floor areas span 42–65 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (September 2023) shows a C (score 75), near the top of the C band. When first surveyed in January 2010 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Poor to Good, hot-water efficiency went from Poor to Good and lighting went from Good to Very Good; while window efficiency dropped from Good to Average.

At 64 m² it's 28% larger than the typical home in the postcode (50 m² median across 27 EPCs). On a £-per-square-foot basis, the last sale (£360/sq ft) was about 38.7% above the typical sold price in the postcode. Sold December 2018 for £248,000.