The raised up storage and mold in this garage are tell tale signs of moisture issues even if the water on the floor was not present. If you go into a basement and everything is stored up off the ground you should be asking yourself why. Rusted nails in baseboards, or appliances with rusted feet can also be good indicators of a moisture issue.

Most of these issues will also be accompanied by a mildew odour so be aware of all your senses when looking at a home.