In short, yes.

• You can change Tenancy in Common to Joint Tenancy, for example if you get married and want to have equal rights to the whole property.
• You can change from Joint Tenancy to Tenancy in Common, to leave your share of the property to someone else. For example, if you’re separating or getting a divorce.
• You can also change from sole ownership to Tenancy in Common or Joint Tenancy, for example, if you want to add your partner as joint owner. This is called Transferring Ownership.