This question has been asked numerous times.  And my answer is – it depends on your purpose.
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Most parents, as they get older, would want to add their adult children on title of their home to save on probate fee when they pass.  Yes, although it is true that you can “save” on probate fee, but it can cost you more financially and have significant legal impact down the road.

Joint Tenancy vs. Tenants in Common
Property owned by more than one person must be owned in one of two ways: Joint Tenancy or Tenancy in common.  When a property is owned in a joint tenancy arrangement, the interest of a deceased owner automatically gets transferred to the remaining surviving owner(s), meaning the surviving owner(s) has the right of survivourship.  On the other hand, if the property is in tenants in common, the interest in the property becomes owned by the estate of the deceased and is transferred to beneficiaries by the estate.

Joint Tenancy:

• On the death of one joint tenant, their interest in the land passes to the other joint tenants by the right of survivorship and the process continues until there is but one survivor, who then holds the property as sole.
• Each tenant holds common (or undivided) interest. If one owner dies, the remaining joint tenant(s) automatically inherits the property in equal proportions. This does not form part of the estate on one’s death.
• All joint tenants always own an identical and equal portion – for two tenants, 50% each and for four tenants, 25% each.
• Joint tenancy can avoid probate fees and delays. Shares are automatically passed on without probate court interference which can be a major advantage to Joint Tenancy.  
• All names of the group who are joint tenants will show up on the title of the property evenly.
• It is the most common way for a couple to own real property.
• The mortgage of a joint tenancy property requires the unanimous agreement of all joint tenants.
• A joint tenant in certain cases and geographical areas, can apply to the courts to have the land severed and provide each owner with a separate and distinct piece.
• For joint tenancy, approval for co-owner is not needed to break up a joint tenancy.
• All tenants can occupy and manage the property:
  • Can be problematic if one joint tenant refuses to pay their share of the property expenses.
  • If one pays ALL the expenses, they can ask for reimbursement for necessary costs e.g. Property Tax

Tenants in Common:

• Each tenant holds a percentage of interest in the property. If one of the owners dies, their interest in the property passes to their estate to be passed on according to their will.
• Tenants in common is usually used when tenants own the property in unequal shares, i.e. in different percentages.
• “Agreement between Tenants in Common” may be entered into which could override the rights which tenants would normally have under law.
• The tenants can hold equal or unequal shares: Every tenant owns an undivided share in the property therefore is free to possession of the whole property.
• Holder of tenancy in common desires, either to sell of mortgage their interest in the property, that can be done by them without the consent of other tenants
• Does not carry a right of survivourship: if one tenant dies, their interest does not go to the other tenants, but goes to the estate of the deceased. If there is a will, it’s distributed accordingly. However, if there is no will, there are provincial legislations and the person’s assets (including tenant’s interest of property) would be distributed to relatives according to that legislation.
• If an individual is purchasing properties for investment purposes with people that are not relatives, tenants in common would be appropriate as then their shares will not automatically go to the remaining tenants.

 
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