Interior threshold lowering is part of Safety & Accessibility. For wider openings, see doorway widening; for broader access changes, compare mobility and aging-in-place modifications.
What Interior Threshold Lowering Covers
Threshold lowering addresses a raised transition between interior spaces when the existing profile creates an unnecessary step or rolling barrier. The floor materials on both sides, door operation and the construction beneath the threshold determine what can be changed.
Removing height at a transition can expose gaps or create new floor-level differences. The work should account for a durable transition rather than simply removing a piece and leaving unfinished edges.
Before the Work
Photograph the threshold from both rooms and with the door open and closed. Measure the approximate height difference and width of the opening.
Show flooring materials, door sweep or bottom clearance and any nearby trim. If the threshold is part of a waterproof or exterior transition, that is a different condition and should be identified.
What Can Change the Scope
Floor thickness, subfloor condition, door clearance, adjacent trim and whether the threshold conceals a change in floor elevation can alter the work.
If the two floors are genuinely at different heights, a transition solution may be more appropriate than trying to make the threshold disappear entirely.
What to Send With Your Request
- Photos from both sides of the opening.
- Threshold width and approximate height.
- Close-ups of both flooring materials.
- A photo showing door-bottom clearance.
Explain whether the goal is easier walking, rolling access or replacement of a damaged transition.
Common Questions
Can every raised threshold be made completely flat?
Not always. The actual floor elevations and materials may require a transition profile even after the original threshold is changed.
Will changing the threshold affect the door?
It can. Door-bottom clearance, sweep and trim should be checked as part of the project.
Related Services
Use Safety & Accessibility for related work. Doorway widening addresses clear opening width, while mobility and aging-in-place modifications covers broader access planning.