10 Helmsley Drive, Coundon, Bishop Auckland, DL14 8NX

10 Helmsley Drive is a three-bedroom detached house in Coundon, Bishop Auckland, Bishop Auckland (DL14 8NX). It has a recorded floor area of 94 m² (around 1012 sq ft), construction records dating it to 1976-1982 and council tax band C. The latest certificate (February 2015) shows a D (score 61), on the cusp of jumping into the C band. The rating has held steady at D across 3 certificates since January 2013. Between certificates, hot-water efficiency went from Average to Good and lighting went from Very Poor to Poor; while roof efficiency dropped from Good to Poor and window efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 82), a 2-band jump. The latest certificate is from February 2015, so improvements made since then won't be reflected.

Held since December 1999 — that's 27 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 £176,000 sits 211.5% above the 1999 sale of £56,500. On a £-per-square-foot basis, the last sale (£56/sq ft) was about 48.8% below the postcode norm. At 94 m² it's 23.7% larger than the typical home in the postcode (76 m² median across 18 EPCs).