尊敬的网民：

       您好，就您的问题答复如下：

        老人的房子过户给儿子无需经过女儿同意。如果当时老人是无条件的将房子赠与儿子，现在房子不能改回老人的名下。但所有儿女都有赡养老人的义务。

                                                                                                                                        感谢您的参与！

                                                                                                                                                                     天津华盛理律师事务所

                                                                                                                                                                      胡明   律师