If it is residential, it is 70 years, if it is commercial and residential building, it is 50 years. Whether it is a new house or not depends on whether you want to borrow money. If there is no loan, you have to pay after signing the contract. If you get a loan, you have to pay 60% for the second set and 40% for the first set. Regardless of whether the loan is granted or not, you should leave tens of thousands of final payment, and then pay the final payment when the house is ready.