Stairlifts for Narrow Stairs: What Fits and What It Costs

Published 8 September 2025 · Last updated 12 November 2026

Quick answer: Acorn says its 130 straight stairlift needs about 66 cm (26 inches) of stair width and its 180 curved stairlift about 70 cm (27.5 inches), so you can swivel off comfortably at the top. Other makers’ figures differ. Folded, common models stick out roughly a third of a metre. If your stairs are narrower, a perch seat, a slimline model or a hinged rail may still work, but only a survey can say for certain.

How narrow is too narrow?

Stair width is measured at the narrowest point, which is often at a handrail, a radiator or a newel post, not halfway up. Three numbers matter:

• Stair width: the space the seated user, the seat and the rail need while the lift moves. Makers quote a minimum for each model.
• Folded width: how far the lift sticks out when the seat, arms and footrest are folded. This is what everyone else on the stairs has to walk past.
• Space at the top and bottom: the seat swivels at the top so you step off onto the landing, not the stairs. A door at the foot of the stairs can clash with the end of the rail.

What the makers publish

Makers measure in different ways, so compare like with like and ask the surveyor for the figures for your stairs. Where a maker gives two figures for the same thing, plan around the less favourable one.

Options when the stairs are tight

A perch (standing) seat

You ride half-standing, leaning against a narrow padded seat. It takes less width and suits people who find it hard to bend their knees, but you need enough balance and strength to stand for the ride. Perch stairlifts explained.

A slimline model

Some lifts are built with a narrower seat and a rail that sits close to the wall. Ask for the folded width in writing, because “slimline” has no fixed meaning.

A hinged or retracting rail

If the rail would block a door or a hallway at the bottom, a powered hinge lifts the end of the rail out of the way when the lift is parked upstairs.

Rail on the other side

On some staircases the rail can go on the inside of a bend or the opposite wall to leave a wider walkway. That can turn a straight job into a curved one, which costs more.

Will others still be able to use the stairs?

Usually, yes, if the folded lift leaves a clear walkway. With the seat folded the lift takes up roughly a third of a metre, and the rail sits low on the treads. Check the folded width against your narrowest point, and think about anyone who carries laundry or uses a walking stick on the stairs.

What a stairlift for narrow stairs costs

Narrow stairs do not have a separate price list. A straight stairlift for a narrow flight is priced like any other straight lift, and extras such as a perch seat or a hinged rail are added to the quote. UK sellers advertised new straight stairlifts at a median of £1,995 on 20 October 2026, across 25 published prices (StairliftCosts price tracker, a sister site of Review Mobility). Those are advertised prices, mostly “from” prices, not quotes. If the narrow section means a curved rail, the median advertised price was £4,597.50. See stairlift prices by type or try the cost calculator.

Before you get quotes

• Measure the stairs at the narrowest point and note anything that sticks out: radiators, handrails, door frames.
• Ask each company for the minimum stair width and the folded width of the model they propose, in writing.
• If you might qualify for help with the cost, ask your council for an occupational therapy assessment first. Grants and funding.
• Compare at least three quotes. What a fair quote includes.

Last reviewed: 27 October 2026. Sources: Acorn Stairlifts UK FAQ and Acorn 130 and 180 product pages (acornstairlifts.co.uk); Handicare 1100 dimension sheet, 2019; Rosscare, Stannah Siena 600 listing; StairliftCosts price tracker, capture of 20 October 2026. We do not test stairlifts; figures are as their makers or dealers publish them.

In a terraced house the front steps can be harder to solve than the stairs: see stairlift or ramp for a terraced house.

Frequently asked questions

What is the minimum stair width for a stairlift?

It depends on the model. Acorn says its 130 straight lift needs 26 inches, about 66 cm, and its 180 curved lift needs 27.5 inches, about 70 cm. A perch seat or slimline model may fit narrower stairs. A survey is the only reliable answer.

Can you fit a stairlift on very narrow stairs?

Often, with a perch seat, a slimline model or a rail placed to leave the most room. A few staircases cannot take any stairlift, and then a stairlift alternative such as a through-floor lift or a second banister may be the answer.

Does a stairlift for narrow stairs cost more?

Not in itself. The price depends on whether the rail is straight or curved and on extras such as a perch seat or hinged rail.

How far does a folded stairlift stick out?

Roughly a third of a metre on common models: Acorn gives 310 mm for its 130, Stannah’s Siena 600 is listed at 344 mm, and Handicare’s 1100 sheet gives 320 mm to the footplate.

Published 8 September 2025 · Last updated 12 November 2026