3 Constantine House, Fetter Lane, York, YO1 6DF

3 Constantine House is a detached house in York (YO1 6DF). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to 1996-2002 and council tax band C. At 46 m² this is the 2nd smallest of 9 units on EPC record in the building, where floor areas span 45–56 m². The building's EPC ratings span D to B, with this unit at the bottom. On EPC score it ranks last in the building (58 versus a best of 83). The latest certificate (March 2020) shows a D (score 58), a step below the typical UK home. Earlier certificates rated it C (February 2009); the latest reading is one band lower. Between certificates, lighting went from Average to Very Good; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Average to Very Poor. The recommended improvements would push it to C (score 76). Main heating runs on electricity.

On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2002–2018, sale prices on this property compounded at 1.9% per year. Today's modelled estimate of £193,000 is 22.5% above the 2018 sale price. On a £-per-square-foot basis, the last sale (£318/sq ft) was about 19.5% above the typical sold price in the postcode. Sold December 2018 for £157,500.