If your staircase has any curves or turns in it, you will most likely need a curved stairlift. If your staircase has a flat bed, it’s sometimes possible to install 2 straight stairlifts, which might be cheaper than a curved stairlift. However, the user will need to be able to transfer between the two lifts. Curved stairlifts can be designed to travel onto the landing instead of stopping at the top of the stairs.
Curved stairlifts require a curved rail that has to be made to measure to fit the exact dimensions of your staircase. A curved stairlift will be slightly more expensive than a straight model because there is more technical work involved to customise it to your stairs.
Most stairlifts can be installed with optional folding rails. These mean that if you have a doorway near the top or bottom of your stairs, you can fold the rail up out of the way so people using the door won’t trip over it.