11 Chiltern Avenue, High Wycombe, HP12 3UR

11 Chiltern Avenue is a semi-detached house in High Wycombe (HP12 3UR). It has a recorded floor area of 57 m² (around 614 sq ft), construction records dating it to 1930-1949 and council tax band B. The latest certificate (November 2013) shows a D (score 60), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since December 2010. Between certificates, window efficiency went from Poor to Average; while lighting dropped from Very Good to Poor. The recommended improvements would push it to C (score 77). The latest certificate is from November 2013, so improvements made since then won't be reflected. At 57 m² this is the 5th smallest of 30 units on EPC record in the building, where floor areas span 34–165 m². The building's EPC ratings span E to C across 30 units on file.

Across 2000–2014, sale prices on this property compounded at 10.5% per year. Today's modelled estimate of £196,000 sits 56.8% above the 2014 sale of £125,000. On a £-per-square-foot basis, the last sale (£204/sq ft) was about 21.6% above the typical sold price in the postcode. Last sold in May 2014, so it's been off the market for around 12 years. Across the public record there are 4 sales, relatively high churn for a single property. At 57 m² it's 21.9% smaller than the typical home in the postcode (73 m² median across 29 EPCs).