Flat 10, 7 Park Road, Grendon Underwood, Aylesbury, HP18 0TD

Flat 10 is a two-bedroom end-of-terrace house in Grendon Underwood, Aylesbury, Aylesbury (HP18 0TD). It has a recorded floor area of 52 m² (around 561 sq ft), construction records dating it to 2003-2006 and council tax band B. At 52 m² this is the 2nd smallest of 8 units on EPC record in the building, where floor areas span 52–149 m². The building's EPC ratings span G to C, with this unit at the top. On EPC score it ranks first in the building (74 versus a worst of 17). The latest certificate (March 2011) shows a C (score 74). When first surveyed in November 2010 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Average to Good, window efficiency went from Average to Good and lighting went from Good to Very Good; while hot-water efficiency dropped from Average to Poor and main heating dropped from Average to Poor. Main heating runs on electricity. The latest certificate is from March 2011, so improvements made since then won't be reflected.

Held since August 2005 — that's 21 years off the open market, well above the local norm. At 52 m² it sits well below the postcode median (122 m² across 13 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 77% of similar EPCs). Across 2002–2005, sale prices on this property compounded at -22.6% per year. Today's modelled estimate of £187,000 is 43.8% above the 2005 sale price. On a £-per-square-foot basis, the last sale (£232/sq ft) was about 45.8% above the typical sold price in the postcode.