Generally, yes. You can sell the building on the land (which you own) and transfer the lease (sometimes for a fee, sometimes not). My family has a cabin North of Seattle, WA (USA) that is on land that a non-profit cultural association just renewed a 99 year lease on from a railroad (I forget which one). So long as you abide by the org rules sales are easy. I do not know how universal such set-ups are.