Castle House, Flat 10, Castle Street, Calne, SN11 0EY

Castle House is a two-bedroom semi-detached house in Calne (SN11 0EY). It has a recorded floor area of 71 m² (around 764 sq ft), construction records dating it to 1996-2002 and council tax band C. At 71 m² this is the 10th smallest of 14 units on EPC record in Castle House, where floor areas span 30–97 m². The building's EPC ratings span E to B, with this unit at the bottom. The latest certificate (April 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 February 2009. Between certificates, window efficiency went from Very Poor to Poor, hot-water efficiency went from Very Poor to Poor and lighting went from Very Poor to Poor; while roof efficiency dropped from Good to Average and main heating dropped from Poor to Very Poor. The recommended improvements would lift it to C (score 69), a 2-band jump. Main heating runs on electricity.

Held since June 2000 — that's 26 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £175,000 sits 66.7% above the 2000 sale of £105,000. It lags the bulk of the postcode on energy efficiency (less efficient than 77% of similar EPCs).