The sale of a residential immovable intended for a natural person who acquires it to live in it, whether it is built or to be built by a builder or developer, must be preceded by a preliminary contract. Article 1785 of the Civil Code of Quebec obliges the builder to enter into such a prior-contract with the buyer (which precedes the contract of sale itself). This contract formalizes the promise to sell and buy the property by the parties involved in a transaction. In particular, it sets the purchase price of the home, its delivery date and the date of the deed of sale, usually the day on which the buyer will be able to move in. A deposit will usually be required when he signs it.