Choosing between a straight and a curved stairlift is the single biggest decision in this purchase. It dictates the price, the lead time, the install complexity, and which UK installers you can use. It also isn’t really a choice — your staircase decides for you. This guide explains exactly what each type is, when you need which, and how to tell at a glance which yours is.
The simple rule
If your stairs go straight up in one continuous run with no turns, bends, or landings between top and bottom, you need a straight stairlift.
If your stairs have any turn, bend, half-landing, intermediate landing, or curve of any kind, you need a curved stairlift.
There is no in-between, regardless of what any salesperson may tell you. A “straight lift with a small bend at the bottom” is a curved lift. A “straight lift with a 90° turn at the top” is a curved lift. The rail is either one continuous straight piece, or it isn’t.
How to tell which yours is
Stand at the bottom of your stairs and look up. Walk from bottom to top counting your steps. As you walk, ask:
- Did I have to turn at any point? Even slightly?
- Did I step onto a small landing partway up before continuing?
- Are any of the steps wedge-shaped (wider on one side than the other)? These are called “winder” steps, and they always mean curved.
- Does the top of the stairs face the same direction as the bottom?
If the answer to any of those is yes, you need a curved stairlift. If you walked straight up in one unbroken run with no turns, you need a straight stairlift.
Straight stairlifts: what to know
Cost
£1,800 to £2,800 fitted for a new indoor straight lift. £2,800 to £4,000 for outdoor. Reconditioned straight lifts start around £800 fitted. See our cost guide for full ranges.
Lead time
Often installed within 5 to 10 working days from order. Some reconditioned lifts can be installed within 48 hours. This is the major practical advantage if you need a lift quickly.
Survey requirement
A home survey is sensible but often not strictly required. Some installers will price and install from measurements alone (width, length, number of steps, rise and going) — exactly the measurements our quote tool asks for.
Removability
Straight rails are off-the-shelf components. When the lift is no longer needed, it has good resale value as a reconditioned unit. Removal is straightforward (typically £100–£150).
Curved stairlifts: what to know
Cost
£4,500 to £7,500 fitted for a single-bend curve. £7,500 to £12,000+ for multi-bend or complex installs. Reconditioned curved lifts are rare (rails are bespoke), but adapted reconditioned options exist from £2,500 to £5,500 if your staircase happens to match an available rail.
Lead time
4 to 6 weeks from order to install is typical. The rail has to be manufactured to your exact staircase, then shipped and fitted. If you need a lift urgently, this lead time is the main reason families look at temporary or reconditioned options first.
Survey requirement
Always required. A surveyor visits the home, takes precise measurements with specialist equipment, and photographs every angle of the staircase. The measurements go to the rail manufacturer to build your bespoke rail. There is no way around this step for curved lifts.
Resale and removal
A bespoke curved rail only fits your specific staircase. When the lift is no longer needed, the carriage and seat have resale value but the rail typically does not — it can sometimes be cut down and adapted but rarely fits another home directly.
The edge cases people get wrong
“Dog-leg” stairs (90° turn with a small landing)
If your stairs go up, hit a small landing, turn 90°, and continue up, this is a curved stairlift. Some installers will quote you a “two-lift” solution — one straight lift to the landing, another straight lift continuing up. This is cheaper per lift but means transferring between the two at the landing. For most users this defeats the purpose. A single curved lift is almost always the better solution.
“L-shaped” stairs with winders (wedge steps)
Winder steps are wedge-shaped steps that turn the staircase as it climbs, instead of using a flat landing. These are always curved-lift territory. The rail follows the natural curve of the winders, which is genuinely lovely engineering.
U-shaped or “switchback” stairs
Stairs that go up, turn 180° at a half-landing, then continue up are a curved lift but at the higher end of the price range due to the tight 180° bend in the rail.
“Can I save money with two straight lifts instead of one curved?”
This is one of the most common questions and the answer is usually no. Yes, two reconditioned straight lifts can cost £1,600–£3,600 combined, which sounds cheaper than a £5,000+ curved lift. But:
- The user must stand up, transfer to the landing, walk a short distance, then sit down on the second lift. This is exactly the activity a stairlift exists to remove.
- You’re maintaining two lifts, two warranties, two battery cycles.
- The landing needs enough space to safely turn — many UK landings are too narrow.
- Resale value of two old straight lifts is not double a curved lift’s value.
Two straight lifts only make sense in a few situations: a very fit user who only needs assistance on the longest staircase section, a temporary fix while waiting for a curved install, or a very wide split-level home where the user genuinely walks between two staircases anyway.
Quick decision summary
- Straight staircase, no turns: straight stairlift, £1,800–£4,000 fitted, 1–2 week lead time
- Any bend, turn, landing, or winder: curved stairlift, £4,500–£12,000+ fitted, 4–6 week lead time
- Need it fast? Reconditioned straight from £800; reconditioned curved very limited
- Outdoor stairs? Add £600–£1,200 to the relevant range
Once you know which type you need, use our quote tool to get an honest price band for your specific stairs.