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 32–117 m². The building's EPC ratings span E to C across 24 units on file.

It changed hands recently, sold August 2025 for £145,000. Across the public record there are 4 sales, relatively high churn for a single property. 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 2003–2025, sale prices on this property compounded at 2.2% per year. Today's modelled estimate of £184,000 is 26.9% above the 2025 sale price. On a £-per-square-foot basis, the last sale (£293/sq ft) was about 100.1% above the typical sold price in the postcode.