If you are a Canadian Citizen or Permanent Resident and you are 18 years of age or older and a resident in Canada, you possess the main requirements to sponsor your family to Canada. Other requirements relevant in the application, such as criminal background will apply as well.
Not all family members can be sponsored. Family members that can be sponsored include grandparents, parents, spouse and common-law. In addition, brothers, sisters, nephew, nieces, grandchildren can be sponsored if they are under 18 years of age, orphaned and not married or in a common-law relationship. Dependent children under 19 years of age can be sponsored as well. There are other unique cases of family members that can also be sponsored depending on the number of family members the sponsor has alive.
In the process, both the sponsor and the sponsored applicant will be evaluated. Take into consideration that every person that comes to Canada as a Permanent Resident has an obligation of residency and an undertaking responsibility.
There is another option for parents and grandparents to visit Canada applying through the Super Visa. The Super Visa provides multiple entries and authorizes them to stay in Canada for up to 2 years. It is valid for up to 10 years.