Inside, keep an eye out for cracks of any kind. Cracked sheetrock, floorboards and tiles are always causes for concern. Stubborn doors and windows that refuse to open or shut are also indications of a problem.
The outside of your home can also offer evidence of foundation issues. Check the foundation of the home, as well as bricks / siding, for cracks. Also look for gaps around doors and windows.
The garage can also show deformation when foundation problems are present. Be on the lookout for cracked bricks, warped walls and any separation between the garage door and ground.
Because your basement is closest to your foundation, it’s often the first area to suffer. Check it for cracked or leaning walls and any possible flooding.