You can live in a house with foundation problems, but it's not advised that you ignore them. Living in a house with foundation problems depends upon nature of the issues. If the house has minor foundation problems, such as small cracks or settling, this shouldn't pose a health risk. However, major settling can cause structural issues leading to problems like gas leaks and rodent infestation, and should be addressed. Buying a house with foundation problems can be acceptable, but get an inspection before buying to identify the cost of fixing them.