There is no usual age that a patient requests a face lift. It can be from 30's to 80's. Although, a brow lift can work wonders for younger patients whose only complaint is horizontal lines on the forehead and sagging brows or slightly hooded eyes. Brow lifts are often requested in the late 20's-early 30's category and up. It is quite possible that a brow lift is all that is needed.
However, A face lift can produce better results in those who are more mature or need extensive lifting and tightening or rejuvenation. Seeking an entire lifting of the facial skin and/or structure to produce a more youthful and alert appearance. You can discuss your available options with your surgeon to determine what is best for your individual case.