The Van Andel Institute in Grand Rapids will double in size with construction costs in the $120-150 million range, according to plans released May 17.

Construction on the 280,000-square-foot addition would begin next spring. The addition will stretch from the back of the current building down to Division Avenue and over to Crescent Street.

David Van Andel, the chairman and chief executive officer of the medical research and education center, made the announcement Tuesday, the fifth anniversary of VAI's opening.

"We can get into areas of research we haven't done before," he said. "We are already deep into cancer. Now, we can add Parkinson's disease, Alzheimer's and nutritional research."