Shandong Shanghai steel structure
please do not go with shandong Shanghai steel structure. the electrical wiring is all faulty, with no earthing cable a fire hazard, and not according to Australian standards even though they give a certificate. the front door doesn't close. the roof leaks and as soon as they get your money they don't answer your concerns and ignore u. they made a huge mistake with sizing of house which cost us thousands more in freight. also did not send Aircon or hot water system. they will encourage you not to share with Alibaba in the purchase which then u have no backup. plssss this company does not care and their work is poor