This type of agreement transfers the obligations of one party under a contract to another party. In real estate transactions, an assumption agreement allows a third party to "assume" or take over the loan of the property's seller.It may make a contract voidable if: 1. The mistake concerned a basic assumption on which the contract was made 2. To reserve funds in the program the borrower is required to have a signed real estate purchase contract for a specific address. The succinct answer is a Master Agreement is a legal and binding contract that has established. Article 12 CONSTRUCTION OF ORDINANCES.