91a, Amersham Road, High Wycombe, HP13 5AA

91a is a semi-detached house in High Wycombe (HP13 5AA). It has a recorded floor area of 50 m² (around 538 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (July 2016) shows a D (score 65), on the cusp of jumping into the C band. The rating has held steady at D across 3 certificates since June 2009. Between certificates, roof efficiency went from Poor to Good, window efficiency went from Poor to Average and lighting went from Very Poor to Average. The recommended improvements would push it to C (score 75). At 50 m² this is the 4th smallest of 23 units on EPC record in the building, where floor areas span 40–234 m². The building's EPC ratings span E to B across 23 units on file.

It hasn't traded since June 2003, a hold of 23 years that's notably long for the area. Across 1998–2003, sale prices on this property compounded at 12.3% per year. Today's modelled estimate of £227,000 sits 87.6% above the 2003 sale of £121,000. On a £-per-square-foot basis, the last sale (£225/sq ft) was about 15.4% below the postcode norm. At 50 m² it sits well below the postcode median (129 m² across 22 EPCs), making it one of the more compact homes locally. One historical planning record sits against the property in 2019.