Common cosmetic causes
Drywall joints, seasonal movement, minor framing changes, and normal material shrinkage can produce small cracks.
Patterns worth noting
Diagonal cracks at door and window corners, recurring cracks after repair, or cracks that widen along with floor or door changes deserve closer attention.
Check the whole house
A foundation evaluation looks at patterns across the structure rather than treating one drywall crack as decisive evidence.
Next step
Compare foundation cracks and other warning signs.