18 Ash Close, Aylesbury, HP20 1XX

18 Ash Close is an end-of-terrace house in Aylesbury (HP20 1XX). It has a recorded floor area of 25 m² (around 269 sq ft), construction records dating it to 1983-1990 and council tax band A. At 25 m² this is the smallest unit on EPC record across the building (25–68 m²). The building's EPC ratings span D to B, with this unit at the bottom. The latest certificate (May 2020) 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 July 2009. Between certificates, lighting went from Poor to Very Good; while hot-water efficiency dropped from Average to Poor and main heating dropped from Poor to Very Poor. The recommended improvements would push it to C (score 79). Main heating runs on electricity.

At 25 m² it sits well below the postcode median (55 m² across 18 EPCs), making it one of the more compact homes locally. Across 2002–2015, sale prices on this property compounded at 2.1% per year. Today's modelled estimate of £114,000 is 31% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£323/sq ft) was about 16.5% above the typical sold price in the postcode. 11 years since the last transfer (April 2015).