The house can be used after five years of purchase. Application steps: 1. Go to the housing developer to get a quality acceptance report. 2. Write down the address of the house and the parts to be repaired, and then ask two or three householders to sign it. Residential property and residential management committee shall sign and seal. 3. Sign in the Property Management Office of the Construction Bureau. Then find a qualified maintenance company and management office to conduct on-site survey and record the maintenance area. 4. After the quotation is made by the maintenance company, the maintenance contract applicant can sign it without any problems. The management office will review the signature and submit it to the Housing Authority for capital cost review. If it's reasonable, sign it. Then go to the maintenance fund office to check if there are any units or communities that don't pay the fund. If not, urge them to pay. If you hand it in, ask the owner of the residence to sign it and leave a phone number. After the formalities are complete, it can be handed over to the management office of the construction bureau. After the construction, the management office will check the condition of the maintenance parts together with the maintenance company and the applicant. If there are no questions, sign and accept. The writing is a bit general. I hope you can understand. Remember to add points.