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

91b is a one-bedroom 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). The latest certificate is from July 2016, so improvements made since then won't be reflected. At 50 m² this is the 4th smallest of 24 units on EPC record in the building, where floor areas span 40–234 m². The building's EPC ratings span E to B across 24 units on file.

It hasn't traded since June 2010, a hold of 16 years that's notably long for the area. Across the public record there are 4 sales, relatively high churn for a single property. Across 1997–2010, sale prices on this property compounded at 7.9% per year. Today's modelled estimate of £195,000 sits 63.9% above the 2010 sale of £119,000. On a £-per-square-foot basis, the last sale (£221/sq ft) was about 18.7% below the postcode norm. At 50 m² it sits well below the postcode median (125 m² across 23 EPCs), making it one of the more compact homes locally.