BOMA BESt is the Canadian industry standard for commercial building sustainability certification. BOMA BESt is the only assessment and certification program of its kind for commercial buildings in Canada. It is a unique, voluntary, national program designed to assess environmental performance and management of existing buildings, and is offered by the Building Owners and Managers Association of Canada (BOMA Canada) as a service to all commercial building owners and managers across Canada. The Program provides a consistent framework for owners and managers to critically assess six key areas of environmental performance and management: Energy, Water, Waste Reduction and Site, Emissions and Effluents, Indoor Environment and Environmental Management System. Since its launch in 2005, BOMA BESt has seen tremendous uptake, with over 3,500 buildings representing nearly one billion square feet of Canadian commercial real estate, having applied for certification or recertification to date. The growing trend toward building assessment and certification through BOMA BESt speaks to the value this Program has provided, and continues to provide, to the Canadian commercial real estate industry.