What normal settling looks like
Every house settles a little. The soil under a new house packs down under its weight, and new wood dries and shrinks. In an older house, small shifts keep happening, just very slowly. These signs are usually normal.
Hairline cracks in drywall,
About the width of a hair, often at the corners of doors and windows.
Small cracks where the ceiling meets the wall,
In the first year or two of a new house.
Nail pops,
Small round bumps where drywall nails push out.
Thin cracks in a garage slab
Or driveway that do not grow and stay flat.
Creaks and pops at night,
From wood and ducts moving with temperature.
One home builder's guide calls cracks of a sixteenth of an inch or less normal and common in new homes. Settling is most noticeable in the first few years and slows after that.