The new offices will be based in the Eden Foundation building, and there are also plans to create its first solar test site on an area of brownfield land on the perimeter of the site.
Centre director Barry Marsh said: “This exciting opportunity ends months of negotiation on various sides and will enable us to start development plans for our PV performance testing site – a very important part of what we do.”
Dan James, Eden’s development director, added: “We are delighted to welcome the BRE national Solar Centre to Eden.
“In a short period of time the centre has become an important research base of the national solar industry and we look forward to working in collaboration long into the future.”
The move is due to take place early next year.