We review and update our typical installation costs every year. We do this by using installation costs data relating to the last 12 months depending on availability. The data comes from several sources such as national energy efficiency schemes, installers, retailers, and professional industry organisations. These sources are analysed and adjusted according to inflation, location, and date.
Costs used on our website try to illustrate a typical cost only. Costs vary widely and may depend on a property’s size and construction, as well as geographical factors such as having less choice of installers, or higher living costs in cities like London. Our costs don’t typically represent any suitability assessment or remedial work such as surveys, structural alterations or redecoration.
Costs for different house types are calculated using fixed dimensions from the Building Research Establishment (BRE). Where no house type is mentioned we use the average or median cost to represent the most common cost experienced by householders.
If you calculate payback periods using our costs, please be aware that our costs do not include any replacement parts or any maintenance. Using a simple payback methodology (installation cost divided by annual savings) does not consider discount rates, future energy prices, inflation or the lifetime of the installation; therefore, this should be used with caution.
Our numbers provide indicative costs for installing various measures to give householders an idea what to expect. They are in no way intended to replace quotes based on an on-site survey with specific data and actual costs to householders may vary significantly. We always recommend you get at least three quotes.