Flat 9, 7 Park Road, Grendon Underwood, Aylesbury, HP18 0TD

Flat 9 is a one-bedroom mid-terrace house in Grendon Underwood, Aylesbury, Aylesbury (HP18 0TD). It has a recorded floor area of 52 m² (around 560 sq ft), construction records dating it to 1983-1990 and council tax band B. At 52 m² this is the smallest unit on EPC record across the building (52–149 m²). The building's EPC ratings span G to C across 8 units on file. The latest certificate (September 2019) shows a D (score 62), on the cusp of jumping into the C band. Earlier certificates rated it C (October 2009); the latest reading is one band lower. Between certificates, window efficiency went from Average to Good and lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Poor to Very Poor and main heating dropped from Poor to Very Poor. The recommended improvements would push it to C (score 80). Main heating runs on electricity.

At 52 m² it sits well below the postcode median (122 m² across 13 EPCs), making it one of the more compact homes locally. Across 2005–2015, sale prices on this property compounded at -1.2% per year. Today's modelled estimate of £160,000 is 39.1% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£205/sq ft) was about 29.3% above the typical sold price in the postcode. 10 years since the last transfer (December 2015).