Quick answer: If your stairs run in a straight line with no turns or landings, you will normally need a straight stairlift. If your staircase has turns, bends, corners, landings, spiral sections, or multiple flights, you will usually need a curved stairlift with a custom rail. However, the right stairlift also depends on your mobility needs, staircase width, and which features make the lift safe and comfortable for you to use.
If you’re trying to decide between a straight stairlift vs curved stairlift, the shape of your staircase is usually the starting point — but it is not the only factor. The features needed to make a stairlift safe, comfortable and practical to use can also influence which type of stairlift is the right solution for your home.
Straight stairlifts are designed for straight stairs that run in a straight line from the bottom to the top. A curved stairlift is designed for staircases that include turns, bends, corners, curves, intermediate landings, spiral staircases or multiple flights of stairs.
For most homeowners, understanding the difference between these two types of stairlifts is the first step in choosing the right stairlift for their home and mobility needs.
This stairlift guide explains the key differences between straight and curved stairlifts, typical stairlift costs, and how to decide which option may be the right choice for your staircase layout.
Straight Stairlifts: The Most Common Stairlift for Standard Staircases
Straight stairlifts are designed for standard staircases that run in a straight line with no bends or turns.
The stairlift travels along a straight rail or track that is fixed directly to the stairs rather than the wall. The rail is manufactured as a standard item and normally supplied in two sections. The rail is manufactured as a standard item and normally supplied in two sections. In our workshop the rail is cut to the correct size for the staircase before the installation takes place, and it is then fitted to the stairs in the home. Because straight stairlifts are standard products that are often available from stock, the lead time is always shorter than for a curved stairlift, which must be made to measure.
Key features of straight stairlifts
Typical key features include:
- A straight rail fitted along the staircase
- Designed for straight staircases or straight stairs
- Installation time typically around 3–4 hours in many homes
- Available as new, reconditioned or rental stairlifts
- May be suitable for narrow staircases depending on the width of the stairs
Because of the standard rail design, the installation process is normally straightforward and can often be completed in just a few hours.
Typical straight stairlift costs
In the UK, straight stairlift costs typically range between:
£2,000 and £3,500
The final cost depends on factors such as:
- optional features such as powered swivel seats or powered footrests
- whether a powered hinged rail is required at the bottom of the staircase where there is a doorway or hallway
- electrical requirements such as installing a nearby power point if one is not already available
- any additional preparation work required to install the lift in the home, for example moving a radiator or adjusting obstacles near the staircase
Both straight and curved stairlifts can be supplied as reconditioned options. With curved stairlifts, however, a new rail normally still needs to be manufactured so that it matches the exact shape of the staircase.
Curved Stairlift: Designed for Stairs with Turns, Bends or Corners
A curved stairlift is designed for staircases that include turns, bends, curves, corners, intermediate landings, spiral staircases, or multiple flights of stairs. These lifts are commonly used in homes such as townhouses where staircases may run across three or more floors.
Instead of using a straight rail, the lift runs along a custom track manufactured to the exact dimensions of your staircase, meaning the rail has to be made specifically to suit the layout and shape of the stairs.
This allows the stairlift to move smoothly around corners, curves, and stairs with turns.
Staircases that require curved stairlifts
You will usually need a curved stairlift if your staircase includes:
- stairs with bends
- stairs with turns
- a curved staircase
- intermediate landings
- multiple flights of stairs
These layouts are often described as complex staircases because the rail must follow the staircase shape precisely. Because we work with a range of curved stairlift manufacturers and models, it is normally possible to install a stairlift even on very complex curved staircases.
During a stairlift survey we take detailed measurements of the stairs so that the rail can be manufactured to match the exact shape of the staircase layout.
Key features of curved stairlifts
Important features include:
- Custom rail following the shape of the staircase
- Ability to travel around corners and curves
- Designed for staircases with bends or turns
- Greater flexibility for unusual layouts
- Suitable for many complex staircases
Because the rail for a curved stairlift is custom engineered to the exact shape of the staircase, it also takes longer to manufacture than a straight rail. In many cases a straight stairlift can be supplied and installed within about a week from order, because the lifts are often available from stock. A curved stairlift normally requires the rail to be manufactured first, which means the typical lead time is usually around two to four weeks depending on the design.
For this reason it is often better to start planning a curved stairlift earlier rather than waiting until the stairs suddenly become unusable after a fall or injury. Curved stairlifts can also provide useful flexibility on very narrow staircases. In some situations where a straight staircase is too narrow for a standard straight stairlift, a curved stairlift can sometimes be installed on the straight stairs using a downward-facing or upward-facing travel position. This allows the user to travel safely on staircases that might otherwise be too narrow for a traditional straight stairlift.
Key Differences Between Straight Stairlifts and Curved Stairlifts
The table below highlights the key differences between straight and curved stairlifts, including installation time, cost and staircase suitability.
Understanding the key differences between the two options can help homeowners choose the right stairlift for their mobility needs.
| Feature | Straight Stairlifts | Curved Stairlifts |
|---|---|---|
| Staircase type | Straight staircases | Staircases with bends, turns, curves or multiple flights |
| Rail type | Standard straight rail cut to size | Custom rail manufactured to match the staircase |
| Installation time | Usually 1 engineer for around 3–4 hours | Usually 2 engineers for around 4–5 hours depending on complexity |
| Stairlift costs | Generally around half the cost of a curved stairlift | Higher cost due to custom rail design |
| Flexibility | Limited to straight staircases | Can fit very complex curved staircases and sometimes narrow straight stairs where a straight lift will not fit |
In simple terms, the difference comes down to the staircase layout and rail design.
Straight stairlifts use a straight line rail, while curved stairlifts require a rail that follows the exact staircase shape.
How Your Staircase Shape Determines the Right Choice of Stairlift
The shape and layout of your staircase is normally the main factor in deciding which type of stairlift may be suitable.
Situations where a straight stairlift may still work
In some homes the staircase is mostly straight but includes a small quarter landing near the top with only one final step.
In certain cases it may be possible to install a straight stairlift instead of a curved stairlift, provided that:
- there is enough space at the top of the stairs to safely get off the lift
- the user is able to step safely from the stairlift onto the landing
During a home survey, we sometimes see this type of staircase layout, and for some customers a straight stairlift can be a practical solution.
However, it is important to think about future mobility as well as current needs. If at some point the final step becomes difficult to manage safely, the straight stairlift may no longer be suitable and would normally need to be removed and replaced with a curved stairlift that travels all the way to the landing.
For this reason the decision between a straight or curved stairlift is not always just about the staircase shape today, but also about how safely the lift will work for the user over time.
Stairlift Costs: Why Curved Stairlifts Are More Expensive
Many homeowners ask why curved stairlift costs are higher than straight stairlift prices.
There are two main reasons for this.
1. Custom rail design
Straight rails are produced in standard sections, which keeps manufacturing simple.
Curved rails must be:
- designed around the staircase layout
- engineered to follow turns and corners
- manufactured specifically for the staircase shape
Because every curved staircase is slightly different, the rail must be custom built to match the exact shape of the stairs.
2. More advanced technology in the lift
Curved stairlifts also contain more advanced technology than most straight stairlifts. The lift has to be able to safely negotiate turns, corners and changes in direction while keeping the chair level and stable for the user.
This requires additional engineering within the lift itself so it can travel smoothly around bends in the rail. As a result, curved stairlifts typically include more complex drive systems and control technology than a straight stairlift.
Because of the custom rail manufacturing and the additional technology required, curved stairlifts are generally significantly more expensive than straight stairlifts. Installation can also contribute to the cost. A straight stairlift is normally installed by one engineer, whereas a curved stairlift installation is more often a two‑engineer installation, particularly on more complex staircases. This additional labour is another factor that can increase the overall price.
Typical curved stairlift costs in the UK are often between:
£4,000 and £7,000+
The complexity of the staircase, the number of bends, and the rail design can all influence the final price.
Can Stairlifts Be Installed on Narrow Staircases?
A common concern is whether stairlifts will fit on narrow staircases.
In many homes the answer is yes.
Modern stairlifts are designed so that the seat, arms, and footrest fold away when not in use, leaving space for other people to use the stairs normally.
During a survey we check the available staircase width and confirm whether a straight or curved rail can be safely installed.
Expert Advice: Why a Stairlift Survey Is Important
Even if it seems clear whether you may need a straight or curved stairlift, a professional stairlift survey is an important step before installation.
During the survey we do more than just measure the staircase. We also assess you as the user of the stairlift to make sure the lift will work safely and comfortably for you.
This includes:
- measuring the staircase dimensions and layout
- drawing the staircase so the rail design can be planned accurately
- taking your seated measurements and checking your weight so we can confirm the appropriate weight capacity and which stairlift model will be most suitable
- checking clearances such as bannisters, walls and obstacles
Your measurements are important because the stairlift must allow you to sit comfortably and travel up the staircase without your knees or body contacting bannisters, walls or other parts of the staircase.
During the visit we match your dimensions and mobility needs with the dimensions and layout of your staircase to determine which stairlift from our product range will work best in your home.
A stairlift survey usually takes around an hour, allowing time to fully assess the staircase and make sure the correct solution is recommended.
By the end of the survey you should have a clear understanding of:
- which type of stairlift will work on your staircase
- which model or configuration is most suitable
- what preparation may be needed before installation
This process helps ensure the stairlift is not only suitable for the staircase, but also comfortable and safe for you to use every day.
Stairlift for Curved Stairs
If your staircase has turns, corners, bends, landings or curves, you will normally need a curved stairlift. These lifts use a custom rail manufactured to match the exact shape of your staircase, allowing the stairlift to travel smoothly around corners and changes in direction.
Curved stairlifts are commonly used for:
- stairs with turns or bends
- L‑shaped or U‑shaped staircases
- staircases with intermediate landings
- spiral or sweeping staircases
- multi‑flight staircases in townhouses
Because the rail must be manufactured specifically for the staircase, curved stairlifts normally have a longer lead time than straight stairlifts. In many cases the rail takes around two to four weeks to manufacture before installation can take place.
If you would like to learn more about how these systems work and what options are available, see our full guide to stairlifts for curved stairs.
Choosing the Right Stairlift for Your Home
Choosing between straight stairlifts and curved stairlifts usually comes down to understanding the shape of your staircase, your mobility needs, and which features will make the lift safe and comfortable for you to use.
Straight staircases normally require straight stairlifts with a straight rail, while staircases with bends, turns or landings usually require a curved stairlift with a custom rail. In some homes there may be more than one possible option, which is why a professional survey is useful.
If you are unsure which type of stairlift your home needs, the easiest next step is to arrange a free stairlift survey. During the visit we will assess your staircase, take your seated measurements, and recommend the most suitable stairlift for your home and mobility needs.
If you would like to arrange a survey, you can call our team on 0800 019 22 10 and we will be happy to help. The home assessment is free of charge and completely without obligation, and it gives you the opportunity to understand your options before making any decisions.
If we find that a stairlift is not suitable for your staircase or for your personal dimensions, we will explain the alternatives available. In some homes the staircase may be too narrow, or the layout may not safely accommodate a stairlift. In those situations we can discuss other solutions such as through‑floor lifts or home lifts, which can provide safe access between floors when a stairlift is not the right option.
Frequently Asked Questions
Can a stairlift go around corners?
Yes. Stairlifts designed for stairs with turns, bends or landings are called curved stairlifts. They use a custom rail that follows the exact shape of the staircase so the lift can travel smoothly around corners.
Are curved stairlifts always more expensive?
In most cases yes. Curved stairlifts usually cost more because the rail has to be manufactured specifically for your staircase and the lift contains additional technology to travel around bends and corners.
How long does it take to install a stairlift?
A straight stairlift installation is normally carried out by one engineer and typically takes around 3–4 hours. A curved stairlift installation is usually completed by two engineers and can take around 4–5 hours, depending on the complexity of the staircase.
How quickly can a stairlift be installed?
Straight stairlifts are often available from stock, so they can sometimes be installed within about a week of ordering. Curved stairlifts require a rail to be manufactured to the dimensions of your staircase, so the typical lead time is usually around two to four weeks.
Can a stairlift be fitted on narrow stairs?
In many cases yes. Some narrow staircases that are too tight for a standard straight stairlift can sometimes be fitted with a curved stairlift, allowing the user to travel slightly sideways or in a different seating position so the lift can fit safely on the staircase.
What happens during a stairlift survey?
During a stairlift survey we measure the staircase, draw the staircase layout, and take your seated measurements to ensure the stairlift will fit both your staircase and your body dimensions safely. We also check your weight so we can confirm the correct weight capacity and stairlift model for you.
Should you plan a stairlift in advance?
If your staircase requires a curved stairlift, it is often helpful to plan ahead rather than waiting until the stairs become unusable. Because curved rails are custom manufactured, allowing time for the rail to be produced can help avoid unnecessary pressure if your mobility suddenly changes.
Author
Written by Coral Affleck-Major, Director & Co‑Owner of 1st Choice Stairlifts. Coral has worked in the stairlift industry since 1996 and helps homeowners understand mobility options and stairlift suitability.
Technical Review
Technically reviewed by Colin Major, Technical Director with stairlift engineering experience since 1987.
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