11 Herbert Street, Darlington, DL1 5DP

11 Herbert Street is a two-bedroom mid-terrace house in Darlington (DL1 5DP). It has a recorded floor area of 79 m² (around 850 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (February 2016) shows a D (score 62), on the cusp of jumping into the C band. When first surveyed in September 2009 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency went from Very Poor to Good; while window efficiency dropped from Good to Average and lighting dropped from Good to Very Poor. The recommended improvements would lift it to B (score 86), a 2-band jump. The latest certificate is from February 2016, so improvements made since then won't be reflected.

Held since July 2010 — that's 16 years off the open market, well above the local norm. Today's modelled estimate of £104,000 sits 73.3% above the 2010 sale of £60,000. On a £-per-square-foot basis, the last sale (£71/sq ft) was about 20.1% above the typical sold price in the postcode.