Flat 3, 21 Priory Street, York, YO1 6ET

Flat 3 is an end-of-terrace house in York (YO1 6ET). It has a recorded floor area of 21 m² (around 226 sq ft), construction records dating it to before 1900 and council tax band A. At 21 m² this is the 4th smallest of 6 units on EPC record in the building, where floor areas span 20–25 m². The building's EPC ratings span E to C, with this unit at the bottom. The latest certificate (September 2019) shows an E (score 49), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since November 2008. Between certificates, lighting went from Average to Very Good; while wall efficiency dropped from Good to Poor. The recommended improvements would lift it to C (score 76), a 2-band jump. Main heating runs on electricity.

It hasn't traded since February 2009, a hold of 18 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 21 m² it sits well below the postcode median (52 m² across 24 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 83% of similar EPCs). Today's modelled estimate of £142,000 is 43.9% above the 2009 sale price. On a £-per-square-foot basis, the last sale (£437/sq ft) was about 30.4% above the typical sold price in the postcode. One planning record on file: new windows refused in 2011.