There is no definitive answer as the cost can vary depending on a number of factors. However, as a rough guide, you can expect to pay in the region of £1,000 - £2,000 for a new boiler installation and between £350 - £1,000 for additional radiators.

It typically costs between $2,000 and $4,000 to install a new boiler and radiators. However, this cost may vary depending on the size of the home and the type of boiler or radiators that are being installed.