11 Colne Avenue, Mill End, Rickmansworth, WD3 8BS

11 Colne Avenue is a three-bedroom semi-detached house in Mill End, Rickmansworth, Rickmansworth (WD3 8BS). It has a recorded floor area of 88 m² (around 947 sq ft), construction records dating it to 1930-1949 and council tax band D. The latest certificate (February 2016) shows a D (score 60), on the cusp of jumping into the C band. When first surveyed in February 2009 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Average to Good; while window efficiency dropped from Average 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. The home occupies a cul-de-sac position.

Across 1999–2015, sale prices on this property compounded at 6.2% per year. Today's modelled estimate of £521,000 sits 73.7% above the 2015 sale of £300,000. On a £-per-square-foot basis, the last sale (£317/sq ft) was about 24% above the typical sold price in the postcode. On the market in January 2015 and unlisted since — roughly 11 years.