Widen Dad’s Bathroom Door Yourself or Hire a Carpenter? Find the Wall Before the Saw

Dad’s walker fits down the hall. It reaches the bathroom. Then one rear leg catches the casing, the door takes up part of the opening, and the whole operation turns sideways.

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He may call that manageable. He has, after all, been managing it. Your question is narrower: can you gain useful room yourself, or does this job need a carpenter?

Do not answer that by measuring the door slab. Measure the opening Dad actually has while the door is open. Then find out what is hiding inside the wall.

Start with the passage, not the advertised door size

Open the door as far as it normally opens. Measure the narrowest clear distance between the face of the open door and the opposite stop. That is the usable opening. A nominal door width does not tell you how much room Dad gets.

Next, watch one complete trip through the doorway. Do not coach him through it. Note what touches first: the walker, his hand, his shoulder, a foot, the door edge or the casing. Check whether he must back up, rotate the walker or let go with one hand to move the door.

The federal accessibility standard uses a clear opening of at least thirty-two inches for covered accessible doorways, measured with the door open ninety degrees. An ordinary private house is not automatically required to meet that standard. It is still a useful measuring reference, not a promise that thirty-two inches will solve Dad’s particular route. The same standard separately addresses maneuvering room and usable hardware because width alone does not make a doorway work (U.S. Department of Justice, ADA Standards, sections 404.2.3, 404.2.4 and 404.2.7; source trail at Sources).

Write down four measurements: the current clear opening, the width of Dad’s mobility device at its widest point, the distance available beside the latch and the hallway width outside the bathroom. Photograph the tape in place. Those numbers give a carpenter something better than “make it wider.”

The smallest fix may be a hinge job

If the open door itself is stealing the needed space, the first comparison is not DIY widening versus hired widening. It is a hinge change versus wall surgery.

A swing-clear hinge can move the open door farther out of the opening. Removing a protruding door stop may gain a little more. Reversing the swing may help in some layouts, but it changes where the door lands and may create a collision in the hall. Removing the door creates privacy and containment problems that Dad may reasonably reject.

A hinge-only job can sit on the DIY side if the existing frame is sound, you can support and align the slab, and the finished door will still latch without dragging. Before buying hardware, record the hinge size, corner shape, screw pattern, door thickness, swing direction and the gap between the hinge and nearby trim. Check that the relocated door will not strike a grab bar, toilet, cabinet, light switch or person standing in the hall.

Then perform the real test. Put the proposed hardware in place, open the door fully and have Dad make the trip using the device he actually uses. Measure again. If the added clearance does not eliminate the catch point, stop treating hardware as the answer.

Cutting casing is not the same as widening a doorway

Decorative casing can be removed without enlarging the framed opening. The door jamb, jack studs and header remain where they were. A saw taken to the visible trim may produce dust and damage while gaining no usable passage.

Once the plan requires moving a jamb or cutting framing, hire the wall investigation before committing to the opening. The wall may carry load. It may also contain wiring, plumbing, a vent or tile backing. A wider opening can require a different header and new support at each side.

Inside the City of St. Louis, the building division says a permit is required for a structural change or major alteration to an existing building. Municipal rules differ across the metro, so the address controls. Call the building department serving Dad’s property and describe the work plainly: an existing interior bathroom doorway may be widened, and framing may be altered. Ask whether a permit is required, who may pull it and what inspection closes it (City of St. Louis Building Division, residential permit criteria; source trail at Sources).

That call is not surrendering to bureaucracy. It tells you whether the job is still carpentry or has become permitted structural work.

Use a clean DIY line

Keep the job on your side of the line only when all of these are true: the work is limited to removable door hardware or finish trim, no framing will be cut, no concealed utility is in the work area, the door can still provide the privacy Dad wants, and you can test the complete route before calling it done.

Move it to a carpenter when useful clearance requires moving the jamb, when you cannot identify the framing, when tile or flooring must be rebuilt, when the door opening is visibly out of square, or when the local building department says a permit or inspection applies.

If wiring, plumbing or structural framing appears, ask the carpenter which licensed trade will handle that part and whose name will appear on the permit. “We deal with it” is not a scope.

Make the carpenter quote the finished passage

Do not request “a wider bathroom door” and accept a lump description. Ask each bidder to put the following in writing: the finished clear opening with the door open, the hinge type and swing direction, whether framing or the header changes, whether electrical or plumbing work is included, who obtains any permit, how flooring and baseboard gaps will be repaired, how painted surfaces and tile edges will be finished, and what happens to the old door and debris.

Also ask how the room remains usable while work is open. If the bathroom is Dad’s only practical one, the schedule is part of the job. A doorway that is unusable overnight is not a small detail.

Compare quotes by the finished opening and included restoration, not by the size of the replacement slab. A larger slab can still leave a poor passage if the door does not open fully or the approach forces Dad into a tight turn.

Dad still owns the doorway

Dad’s agreement to let you measure is not agreement to remove trim. Agreement to change hinges is not agreement to open the wall. Keep each yes attached to the actual step.

Show him the catch point and offer the smallest test first: “The open door is taking up part of the space. I can price a hinge change without cutting the wall. If that does not give enough room, we stop and get a carpenter to look at the framing.”

If Dad says no to alteration, leave the wall alone. You can still write down the measurements, remove loose objects from the approach with his permission and ask whether he will consider a carpenter’s no-work assessment. For the broader rules this playbook uses when Dad refuses, see About this playbook.

The next move tonight

Open the bathroom door to its normal stopping point. Measure the clear opening from the face of the door to the opposite stop, then photograph the tape. If the door itself is the obstruction, price and test a swing-clear hinge. If gaining enough room requires moving the jamb, call the building department for Dad’s address and one carpenter before anyone picks up a saw.