Yes, in the Province of Ontario, it is legal for a landlord to ban smoking in private rental units.
A decision by the Landlord and Tenant Board in 2008 supported this concept. The legal community states that landlords also have a right to impose additional obligations or restrictions on tenants over and above the standard lease agreement terms. As long as these obligations do not contravene the Ontario Human Rights Code, the Residential Tenancies Act or other federal laws. A landlord does have the right to protect their investment.
