Contains. A commercial housing purchase and sale contract refers to a contract in which a real estate development enterprise sells an unbuilt or completed house to the public and transfers the ownership of the house to the buyer, and the buyer pays the price. It is also called a commercial housing sales contract, which includes maintenance funds. The housing maintenance fund is a special fund used for the maintenance of public parts of the house. It is owned by all owners, and the developer only collects it on behalf of the owner. According to Article 12 of the Ministry of Finance's "Residential Special Maintenance Fund Management Measures", owners should Before moving in, the first phase of the special residential maintenance funds should be deposited into the special housing maintenance fund account. The general practice is that when the owner goes through the house check-in procedures, the developer collects the special property maintenance funds on his behalf, and then deposits them into the local fiscal house special fund. Maintenance fund special account.