Your brother found a stair lift online. Your sister knows somebody who had one installed. You are standing in Mom’s Ballwin hallway wondering whether the chair will clear the door at the bottom.
Do not compare brochures yet. A stair lift is not just a chair and a rail. It is a route through a particular house, used by a particular person, with installation, service and removal attached. If each dealer prices a different version of that job, the lowest total tells you very little.
Give every dealer the same staircase and the same questions. Then turn the answers into line items.
Start with the trip Mom actually needs to make
Write down why Mom needs the stairs. Name the rooms at each end of the route and how often she expects to travel between them. Note whether she carries a cane, walker, laundry, food or anything else. The point is not to judge whether she should use a lift. The point is to show the dealer what the lift must help her accomplish.
Ask Mom to describe the hard parts in her own words. Is it getting onto the seat, turning at the landing, folding the footrest, fastening the belt, standing up at the other end or moving her walker between floors? A smooth ride does not solve a difficult mount or a missing mobility aid upstairs.
If you are uncertain whether the proposed setup fits how Mom moves, get an assessment from someone who is not selling the lift. Ask that person to look at the full route, including the approach, seat, landing and next safe place to stand or sit.
Make every dealer measure the same route
Have each dealer visit the house. Do not treat a phone estimate based only on the number of steps as a final comparison.
Walk the route with the dealer and record the same facts each time:
Is the staircase straight, curved or interrupted by a landing? Which side will hold the rail? How far will the rail extend at the top and bottom? Will the parked chair narrow the stairs, cover a doorway or interfere with a handrail? Can another person still use the stairs? Does the chair block a hall, vent, light switch or door swing?
Ask the dealer to mark the proposed stopping points with removable tape. Put a chair-sized outline where the seat will park. Open nearby doors and carry a basket past it. A drawing can look tidy while the actual landing becomes unusable.
If the dealer proposes a hinged or folding section of rail, ask who must operate it, whether Mom can do that from her usual position and what happens if someone leaves it down.
Compare the rider fit, not the showroom model
Ask each dealer to explain how Mom will get on and off at both ends. Check seat height, seat width, arm position, footrest height and the space available for her knees. Ask whether the seat swivels and locks before she stands. Have the dealer show where her feet and hands go during each part of the trip.
If possible, arrange for Mom to try the proposed model or a close match. A relative trying it for her cannot tell you whether she can reach the controls, fold the arms or feel steady at the landing.
Write down every feature included in the quote. Separate required parts from optional ones. Ask what changes if Mom later needs a different seat position, control style or parking point. Do not let the word custom stand in for an explanation.
Make the power failure part of the demonstration
Ask whether the lift runs from batteries, how those batteries charge and where the charging points will be. Have the dealer show what Mom will see or hear if the chair is not parked where it can charge.
Then ask the practical outage questions. How many trips can the lift be expected to make when household power is off? What affects that answer? What happens if the chair stops between floors? Can it be moved manually, and by whom? Is there a release that Mom could operate without leaving the seat?
Put the answers in writing. Your family also needs a separate plan for where Mom stays during an extended outage. A battery-powered chair is not the same thing as an unlimited stair route.
Separate the product, installation and house work
Tell each dealer to divide the proposal into the lift, rail, controls, delivery, installation, electrical work, permits if required, cleanup and instruction. Ask who performs each part and who is responsible if the installer discovers that the stairs, wall, floor or electrical supply needs additional work.
Ask whether the rail attaches to the stair treads or another surface. Have the proposal name any holes, trim changes or other alterations. If another contractor must prepare the site, identify who schedules that work and who confirms that the lift can be installed afterward.
Do not assume the salesperson, installer and repair technician work for the same business. Write down each company name and the phone number Mom would actually call.
Test the service route before choosing
Give every dealer the same service problem: The chair has stopped halfway up on an evening when you are not at the house. Ask whom Mom calls, who answers, what can be checked by phone and when someone can come to Ballwin.
Ask whether service is performed by the dealer’s staff or sent to another company. Ask where replacement parts come from, whether common parts are kept locally and what happens if the model is no longer sold.
Have the dealer identify what is covered by the product warranty, what is covered by the installation warranty and what is excluded. Ask when each coverage period begins, who pays for labor or a service visit and whether coverage transfers if the house is sold.
A vague promise of good service is not a service plan. Record the call route, service area, labor terms and likely part route as separate lines.
Compare new, used and rental offers as different deals
If a dealer offers a used or reconditioned lift, ask for the model, prior use, replaced parts, remaining coverage and inspection performed before installation. Ask whether the rail is new, reused or cut for this staircase.
If a rental is available, ask what the agreement includes, who owns the equipment, who maintains it and what ends the rental. Put installation, service, minimum use, pickup and damage terms on the comparison sheet.
Do not mix a purchase proposal with a rental proposal in one total. Compare what the family receives, what Mom is responsible for and how the arrangement ends.
Price the exit while everyone is still cheerful
Ask each dealer what happens when Mom no longer needs the lift. Will the company remove it? Is removal included or handled under a separate agreement? Will it patch holes or only take away the equipment? Does it buy back any part, help resell it or leave disposal to the family?
Ask what happens if the lift must be moved to another staircase. A rail fitted to one house may not fit another. Get the answer for the proposed equipment, not a general statement about stair lifts.
The exit belongs in the original comparison because you are the person likely to receive the group text when the chair has to leave.
Put the family contribution beside the dealer quote
The written total is only one part of the family cost. Add the work the dealer leaves behind: clearing the stairs, meeting the installer, arranging electrical work, attending instruction, helping Mom practice, moving a walker between floors, making service calls and handling eventual removal.
Assign each task by name. If your siblings want the least expensive proposal, ask which uncovered jobs they are accepting. A vote for a dealer is not an assignment of the labor to you.
Keep Mom’s payment separate from yours. Save the proposal, signed agreement, proof of payment, model information, serial number, warranty and service notes in one place. If you advance money, record it as its own line before the family starts calling it your share.
Use one final comparison sheet
Give each dealer one column. Use rows for staircase fit, landing clearance, rider fit, controls, power and charging, installation, house preparation, instruction, warranty, local service, replacement parts, removal and the written total. Mark any unanswered item as unanswered. Do not fill the blank with what you think the salesperson meant.
Then ask three closing questions: Which proposal fits Mom’s whole route? Which company gives the clearest service and outage plan? Which agreement leaves the fewest unassigned jobs for you?
Missouri public guidance treats stair lifts as one kind of home modification that may support safety and independence. Assistance and referral options can vary, so check possible help before signing or paying. The site’s Local help page gives you a place to start, and Sources explains the public materials behind this guide.
The right comparison is not chair against chair. It is one complete staircase job against another, including the day it stops working and the day it must come out.