121a, Main Road, Naphill, High Wycombe, HP14 4SA

121a is a four-bedroom detached house in Naphill, High Wycombe, High Wycombe (HP14 4SA). It has a recorded floor area of 158 m² (around 1701 sq ft), construction records dating it to 1976-1982 and council tax band F. The latest certificate (August 2014) shows a D (score 66), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since January 2011. Between certificates, window efficiency went from Average to Good and lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 82), a 2-band jump. The latest certificate is from August 2014, so improvements made since then won't be reflected. The home occupies a cul-de-sac position.

One planning record on file: an extension approved in 2006. Past consents include an extension, meaningful when judging how the property has evolved. At 158 m² it's 27.4% larger than the typical home in the postcode (124 m² median across 11 EPCs). Last sold in December 2014, so it's been off the market for around 11 years. Across 2011–2014, sale prices on this property compounded at 7.4% per year. Today's modelled estimate of £726,000 is 32% above the 2014 sale price.