The Andover Planning Board on Jan. 14 approved plans for expansion of the Merrimack Valley YMCA’s Andover building. The approval marks a significant milestone for the $21 million Andover/North Andover YMCA project, which will double the size of the current facility. The Y is raising money for the expansion through its capital campaign. The project also has received tax-exempt financing provided by Eastern Bank. Once completed, the Y, which currently has 8,000 members, will include an expanded aquatics facility, a new child-care development center, a bigger wellness center, and a rehabilitation center operated by Lawrence General Hospital. With headquarters in Lawrence, the Merrimack Valley YMCA includes the Andover/North Andover YMCA, the Lawrence YMCA, the Methuen YMCA, Camp Lawrence, Camp Nokomis on Lake Winnipesaukee, and Day Camp Otter in Salem, N.H. For more information on the project, visit www.andoverproject.mvymca.org.