Truly, there's no “textbook” answer to this question. The amount of time it takes to get a loan will vary. However, the majority of lenders will close a loan in roughly the same amount of time. In most cases, a buyer's mortgage can be approved within 30-45 days of application.ruly, there's no “textbook” answer to this question. The amount of time it takes to get a loan will vary. However, the majority of lenders will close a loan in roughly the same amount of time. In most cases, a buyer's mortgage can be approved within 30-45 days of application.