100a, Abercromby Avenue, High Wycombe, HP12 3BD

100a is a semi-detached house in High Wycombe (HP12 3BD). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to before 1900 and council tax band B. The latest certificate (August 2019) shows a D (score 68), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since October 2008. Between certificates, roof efficiency went from Poor to Very Good and window efficiency went from Poor to Average; while hot-water efficiency dropped from Very Good to Good and lighting dropped from Average to Very Poor. The recommended improvements would push it to C (score 77). At 46 m² this is the 3rd smallest of 24 units on EPC record in the building, where floor areas span 40–117 m². The building's EPC ratings span E to C across 24 units on file.

At 46 m² it sits well below the postcode median (80 m² across 23 EPCs), making it one of the more compact homes locally. Across 2003–2022, sale prices on this property compounded at 3.4% per year. On a £-per-square-foot basis, the last sale (£345/sq ft) was about 136% above the typical sold price in the postcode. Sold September 2022 for £171,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.