Our house has a smell that moves through the house (different rooms). It's several odors. It can be something like "human gas" to "stinky feet" to "dead rat" to "nasty fish". It will be awful on minute then a few minutes to hours later, it's gone. We notice it a lot at night (which is when we are home). My husband and I blamed each other for the smell the first few weeks.

Also, the house seems to have started becoming unlevel.

My theory is we are over a sink hole (the house was built about a year ago) and we are smelling the gasses rise up from under the house.

Any had any problems with land gas and/or sink holes?