Government research conducted in 2020 stated the average cost of an air source heat pump to be between £8,900 and £14,500, depending on the extent of the home alterations, and around £20,000 - £25,000 for a Ground Source heat pump.
House alterations are also something to consider. Your property’s specifications for example. For a ground source heat pump, you’ll need a substantial outdoor space (around 2x the size of the dwelling) which can be dug up to lay the ground loop containing the heat fluid.
If you don’t have this space or don’t want to dig up your garden, you can drill one or more bore holes to install the collector pipework however this can be quite expensive. If you don’t wish to do either of these, then an air source heat pump may be more suitable, as it doesn’t require a ground collection system.
Your property’s level of insulation will also determine the cost and efficiency of the heat pump you opt for. New build properties are ideal for heat pump installation, as they are fitted to high energy efficiency standards. Older properties can be insulated to these levels, however, it can be quite disruptive.
You may also consider your current heating system – if you have a gas or an oil-fired boiler then you are likely to find the existing radiators and pipework are not large enough for the lower temperature heat that a heat pump operates at.