How can we help you? When do I need a stair lift? 1 out of 2 found this helpful Each person is different, but when you feel that getting up or down a flight of stairs is a struggle or unsafe, it may be time to consider investing in a stair lift. Was this helpful? Yes (1) No (0) Category: General Related Questions How long does the installation take? Are stair lifts expensive? What if my stair lift is on the opposite end of the staircase? How much weight can a stair lift hold?