Mallard House, Flat 15, The Millstream, London Road, High Wycombe, HP11 1AD

Mallard House is a semi-detached house in High Wycombe (HP11 1AD). It has a recorded floor area of 63 m² (around 678 sq ft), construction records dating it to 1983-1990 and council tax band C. At 63 m² this is the 8th smallest of 13 units on EPC record in Mallard House, where floor areas span 55–70 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (October 2023) shows a C (score 72). When first surveyed in March 2020 the rating was D, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Poor to Average and main heating went from Very Poor to Average; while roof efficiency dropped from Good to Average and window efficiency dropped from Good to Average. The recommended improvements would push it to B (score 81). Main heating runs on electricity.

Held since May 2000 — that's 26 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £259,000 sits 146.7% above the 2000 sale of £105,000. On a £-per-square-foot basis, the last sale (£155/sq ft) was about 36.7% below the postcode norm.