Plenty of houses have more than one flight. A main staircase and a basement, a split level and a half flight, three floors in an older house.
A second lift is a separate job
No shared parts, no discount for the rail being similar. Each flight is surveyed, specified and installed on its own, and each is priced accordingly.
That is worth knowing before assuming the second one is cheap.
When it is clearly worth it
The basement holds the laundry. This is the commonest genuine case. Somebody who can reach the bedroom but not the washing machine is still cut off from part of their own life.
Three floors, all in use. Two lifts with a landing transfer between them is a real arrangement and frequently cheaper than an elevator.
A half flight to an entrance. Short runs to a split-level door are among the cheapest jobs we do and among the most useful.
When it is the wrong spend
The second flight leads somewhere nobody goes. An attic, a spare room, a basement used for storage. Move the storage.
The laundry could move. A plumber’s morning to relocate a washing machine costs a fraction of a stairlift, and it is the answer we suggest more often than people expect.
The transfer between two lifts is unsafe. Getting off one lift, standing, turning and getting onto another, on a landing, is a real demand. Bruno does not recommend the Elan for somebody whose knees buckle during a stand-to-sit, and a mid-house transfer asks exactly that twice a trip.
Two straight lifts instead of one curved
The related question. Where a flight turns at a proper landing, two straight lifts can cost meaningfully less than one manufactured curved rail and go in far faster.
The catch is the same: a transfer halfway up. For somebody steady on their feet it is fine. For somebody who is not, it is a bad idea and we will say so rather than take the cheaper sale. Our curved staircase guide works through it.
When an elevator makes more sense
Three or more levels, somebody traveling seated in a wheelchair, or a caregiver riding with them. At that point multiple stairlifts start to look worse than one machine, and our elevator guide covers what that involves.
Phasing it
Do the flight that matters most first and live with it for a few months. The second need either proves itself or turns out to be solvable another way, and either answer is cheaper than buying both at once.
Smaller equipment ships free from our online shop, and a free survey covers every flight in the house rather than the one you called about.
Service on two lifts
Two machines means two annual services, two sets of batteries every couple of years, and two sets of paperwork. Not a reason against, and a real running cost that rarely appears in the comparison.
Ask for a combined service price at the point of purchase rather than assuming it doubles. Our maintenance guide covers what a visit includes.
Where the second one usually goes
In our experience: the basement, for laundry and a workshop; a short flight to a split-level entrance; and a third floor in an older house where a bedroom was moved down but a bathroom was not.
The third of those is worth questioning. Moving the bathroom use rather than the person is sometimes the cheaper answer.
Survey the whole house
Ask for every flight to be measured at the first visit even if you only intend to do one. It costs nothing, it tells you what the second one would involve, and it occasionally reveals that a different flight was the better one to start with.
Buying both at once
If you are genuinely doing both, ask whether a single visit for both flights reduces the installation cost. Frequently it does, because the mobilization is shared even though the equipment is not.
Ask that explicitly rather than expecting it to be offered.
The question underneath
Two flights usually means a house doing a lot of work. It is worth asking honestly whether this house is the right house for the next ten years, and that is a conversation nobody selling stairlifts wants to start.
We will. Sometimes two lifts is right. Sometimes the answer is that the money is better spent moving, and hearing that from a supplier is rarer than it should be. Our vetting guide covers what a straight answer sounds like, and smaller equipment ships free from our online shop.
Doors and parking on both flights
Each flight has its own parking positions and its own door problems. A basement flight almost always has a door at one end, which means a hinged rail section specified with that order rather than the other one.
Sort both at the same survey. Ordering one lift with the hinge and one without, because nobody checked the second flight, is a return visit nobody wanted.
The landing between them
If two lifts are the answer, the landing is the thing to assess rather than the stairs.
It needs room to stand up fully, turn, take a step or two, and sit down again, without reaching for a wall. Measure it: a landing under about four feet square makes that sequence genuinely difficult for somebody whose balance is the reason for the lifts.
It also needs somewhere to rest. A rail on the landing wall, or a small chair, turns a transfer that has to happen in one movement into one that can be taken in stages.
Which flight to do first
Whichever gets them to the bathroom and the bed. That sounds obvious and families frequently start with the basement because it is cheaper or the stairs are shorter.
The test is what happens at three in the morning. Everything else can wait.
Ordering together or separately
If both are certain, ordering together is usually cheaper because the mobilization is shared even though the equipment is not. Ask explicitly what the saving is rather than assuming.
If the second is uncertain, do not order it. A stairlift on a flight nobody ends up using is the most avoidable waste in this trade, and the second flight is where it happens.
Same manufacturer for both
Worth doing where possible. One set of spare batteries, one set of controls to learn, one service relationship, one set of fault codes. It is a small thing that makes the next ten years simpler.
When to stop and think about the house
Two lifts, a ramp at the front, and a bathroom conversion is a lot of money and a lot of disruption for a house that may not suit somebody in five years.
Nobody selling equipment raises that, so we will: at some point the honest question is whether this is the right house. Our accessibility guide covers the single-floor option, which is frequently cheaper than any of it.