Flat 5, 21 Priory Street, York, YO1 6ET

Flat 5 is a one-bedroom end-of-terrace house in York (YO1 6ET). It has a recorded floor area of 20 m² (around 215 sq ft), construction records dating it to 1900-1929 and council tax band A. At 20 m² this is the smallest unit on EPC record across the building (20–25 m²). The building's EPC ratings span E to C across 6 units on file. The latest certificate (July 2018) shows a D (score 58), a step below the typical UK home. When first surveyed in November 2008 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency dropped from Good to Very Poor and lighting dropped from Average to Very Poor. The recommended improvements would lift it to B (score 82), a 2-band jump. Main heating runs on electricity.

It hasn't traded since April 2009, a hold of 17 years that's notably long for the area. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. At 20 m² it sits well below the postcode median (52 m² across 24 EPCs), making it one of the more compact homes locally. Today's modelled estimate of £124,000 is 20.3% above the 2009 sale price. On a £-per-square-foot basis, the last sale (£479/sq ft) was about 43% above the typical sold price in the postcode.