There is no single clearance that suits every door. The gap needed depends on the carpet and underlay thickness, the door’s swing and the condition of its hinges and frame. A carpet layer can advise on the floor build-up, but a qualified carpenter or handyman should check the door on site and decide whether it needs trimming or adjustment. Avoid cutting it based only on an estimate: too much can leave an unnecessary gap, while too little may still cause rubbing. If you are replacing carpet, mention any tight doors before installation and ask the installer to note the finished floor height and likely clearance issue. Then have the tradesperson assess the door with that information before making changes. This is especially useful where several doors or uneven floors are involved. For a carpet project, confirm the chosen carpet and underlay thickness and discuss any tight clearances as part of the measuring and installation planning.
