Mold

A visual check of a home's structure and systems by a trained inspector, usually during the buyer's contingency period. It finds problems before you're locked in; it is not a pass or fail test.

An odorless radioactive gas from the ground that can build up indoors and raise lung cancer risk. A short test can measure it, and a mitigation system can lower it.

A problem that would significantly affect a property's value or a reasonable buyer's decision, such as a cracked foundation or a failing roof. Sellers and agents generally must disclose known ones.

A form where the seller lists known problems with the property, such as leaks, repairs or defects. Requirements vary by state; a few states lean toward buyer-beware rules.

Cracks, settling, or movement in a home's foundation. Some cracks are normal, but serious ones can be costly and may need a structural engineer to assess.