Because the housing maintenance fund is earmarked, it is used to pay for the maintenance and renovation of the main building or public facilities and equipment after the warranty period expires, and it cannot be used for other purposes, so the housing maintenance fund must be paid. If you buy a second-hand house, if the maintenance fund under the name of the house is full and unused, the purchaser no longer needs to pay, but if the maintenance fund under the name has been used and less than 30%, it needs to be paid again. Yoshiya real estate encyclopedia, buying a house needs more knowledge.