There is currently no evidence in the UK showing that wind farms have a long-term impact on house prices.
An extensive study was completed by a US Government-funded agency in 2003. This study examined around 25,000 property sales records over six years, straddling the pre- and post-construction periods of individual wind farms.
The wind farms were built between 1998 and 2001. The study undertook three types of statistical assessment for each of 10 wind farm developments (a total of 30 analyses), looking at the immediate vicinity of the wind farm and at comparable communities without a wind farm. The study found that in 26 of these analyses, property values within 8km of the turbines actually performed better than in the comparable community.
Two separate surveys around the Taff Ely Wind Farm in Mid-Glamorgan and Ardrossan Wind Farm in North Ayrshire drew similar conclusions.
In Wales, Chartered Surveyors and planning consultants Dalton Warner Davies (DWD) looked at house sales around the Taff Ely Wind Farm in Mid-Glamorgan over a three-year period, with some properties only approximately 1km from the wind farm.
The survey, carried out in 2006, found that three areas of housing had expanded since the wind farm began operating, and that asking prices were unaffected by having a direct view of the wind farm. A comparison of 'for sale' prices and original sales prices at 38 properties revealed a 91% increase between 2002 and 2005, compared to an 85% increase between sales prices over the same period elsewhere in Wales.
Six local estate agents were also contacted and all reported that the wind farm did not have any effect on house prices.
The Scottish survey was carried out by Glasgow-based CKD Galbraith, who selected the Ardrossan development because it is relatively close to a built-up area. Operational since 2004, the wind farm is clearly visible from the northern parts of two towns, Ardrossan and Saltcoats, and partially visible from West Kilbride.
Sales prices were tracked from 2000 and compared to the HBOS (non-seasonally adjusted) Average Price Change for Scotland (all houses). The study found that:
"Between 2000 and March 2004, values in the survey area on average increased by 23.1% compared to 7.4% for the Scotland-wide statistics. Similarly, from March 2004 [when the wind farm became operational] to date, property values in the survey area increased by 26% compared to the Scottish average of 17.1%."