Check the building plans or structural drawings
See if the wall runs perpendicular to floor joists or roof rafters
See if the wall is directly beneath another wall on an upper floor
See if the wall is directly above a beam, girder, or support wall below
Check whether the wall is in the center of the house or aligned with major structural lines
Look for beams, posts, or columns ending at the wall
Check whether the wall supports ceiling joists, trusses, or floor framing
Inspect the basement, crawl space, or attic for support members above or below the wall
Determine whether the wall is made of thicker framing or contains structural headers
Verify whether the wall continues through multiple floors in the same location
Ask a structural engineer or qualified contractor before removing or modifying it