Urban, mixed-use redevelopment receives LEED V4 Gold Multi-Family certification EDMONTON, AB, Dec. 16, 2021 /CNW/ - ONE Properties, a privately owned, integrated real estate investment firm is proud to announce that Southpark on Whyte has been awarded LEED Gold certification and is the first LEED V4 Multi-Family Project in Edmonton. The LEED (Leadership in Energy and Environmental Design) certification program is the most widely recognized international mark of excellence for green building in over 160 countries. LEED certification provides a credible, third-party verified approach towards sustainable design, construction, maintenance, and operations of high-performance real estate.