The Hendersonville property home to nonprofit The Memorial Foundation has sold for $15 million. Gallatin-based real estate development and investment firm Southeastern Building Corp. is the new owner of the two-building, 5.8-acre property, according to a release. The foundation was the seller. The address is 100 Bluegrass Commons Blvd., with the Sumner County YMCA located on an adjacent site. Construction on the site was started in 2003 by the foundation, which remains a tenant. Called Bluegrass Commons, the two Class A office buildings offer a collective 91,240 square feet. The Memorial Fou...