Under property law, assignment typically arises in landlord-tenant situations. For example, A might be renting from landlord B but wants to another party (C) to take over the property. In this scenario, A might be able to choose between assigning and subleasing the property to C.
In other words, an assignment clause allows the buyer of a home to sell the place before they take possession of it. In Ontario, assignments are more common in pre-built homes and condos than on re-sale properties, but they are possible on any type of trade.
Sublease. A sublease, on the other hand, is a separate contract between the original tenant and a subtenant. Unlike an assignment, a sublease only turns over part of a property. That means that the original tenant shares the rights and responsibilities to the premises.
An assignment (or assignment of contract) involves one party to a contract assigning their contractual rights and responsibilities to a third party. In turn, the third party fulfills the terms of the contract.
An assignment and assumption agreement is used after a contract is signed, in order to transfer one of the contracting party's rights and obligations to a third party who was not originally a party to the contract.