HOA is the acronym for Home Owners Association. This is a fee charged to each of the home owners in the communcalgary downtown condosity to maintain its public areas. This money is usually for community memberships, or maintenance of a park or lake and is paid by the home owners once per year.
Most HOA fees are found on the title of the property under a restrictive covenant. You may also find that the closer you are to the amenity the higher the HOA is. This is a mandatory fee for the home home owners so make sure that this fee is paid up to date by the seller when buying the property.