How Narrow Is Too Narrow?
Most standard stairlifts need a staircase width of about 75cm to 80cm — that is the rail (around 15cm from wall) plus the folded chair (around 30cm) plus enough clearance for a person to walk past when the lift is parked.
Singapore staircases in older landed homes and HDB maisonettes are sometimes 65cm to 70cm wide. Tight, but workable with the right model.
Slim-Profile Folded Chairs
Most modern stairlifts fold the seat, armrests, and footrest into a compact package when not in use. The narrowest folded profiles on the market are around 27cm to 30cm. Stannah Siena, Acorn 130 in slim configuration, and Otolift single-rail units all sit at this end of the range.
When folded, this leaves enough room for an able-bodied family member to walk past the parked lift on a 65cm to 70cm wide stair. Tight, but usable.
Single-Rail Curved Systems
On curved staircases, Otolift markets a single-rail system instead of the dual-rail design most brands use. The single rail sits closer to the wall, saving roughly 10cm of staircase width compared to dual-rail designs.
For narrow curved staircases — common in three-storey landed townhouses with tight winder turns — this is often the only stairlift that physically fits. Expect to pay a slight premium over standard curved units.
Perch Seats Instead of Full Seats
A perch seat is a small leaning pad instead of a full sit-down chair. The user stands with knees slightly bent and rests against the perch. The folded profile is much smaller — under 25cm — and it works for users who have difficulty bending their knees fully.
Perch seats are not for everyone. They require enough standing balance to stay upright during the ride, and they are unsafe for users at risk of fainting or losing balance. Discuss this with the user's physiotherapist before choosing.
Mounting on the Outside of the Bend
On a curved staircase, the rail can usually be mounted on either the inside (wall-side) or outside (banister-side) of the turn. Outside mounting often gives more usable stair width because the chair body sits further from the wall and over the steps where you would not be walking anyway.
A site survey will determine which side works for your stair. Sometimes mixing sides at different points along the rail gives the best clearance — this is a design call your installer makes.
When the Stair Just Will Not Fit
A few staircases are simply too narrow for any stairlift. Below about 62cm of usable width, you run out of options. In those cases the conversation shifts to alternatives — a small home lift in an adjacent space, or a staircase renovation to widen the run.
Send us photos and measurements of the narrowest point on your staircase. We will tell you straight whether a stairlift fits, and if not, what else makes sense.
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