Hi Netti,
Yes its possible for your ex to buy you out of the property, it doesn't matter whether you are joint tenants or tenants in common. The only consequence is that if one of you die while holding the property as joint tenants the property automatically passes to the surviving tenant, you can't pass it onto beneficiaries in your will.
The buy out process is much like a normal property sell-purchase, and can be complicated so I would recommend retaining a solicitor. The transfer is effected by lodging a transfer document with the Land Titles Office which will be required to be signed by your ex. Since you also have a mortgage, you will need to get your lender’s consent to have your name removed from the title. This may involve getting new mortgage documents drawn up.
In order to avoid stamp duty and other fees, you will need to prove to the Land Titles Office that the nature of your transfer is marriage breakdown, therefore you will also require a formal Separation Agreement signed by you and your ex to avoid Stamp duty for the transfer.
