Sorry you have not received an answer yet. Is your house wood? Compost gets pretty hot.
Maybe you should check with your local nursery man or woman.
I have heard of people filling holes and old pools with anything they can get their hands on and then covering it with top soil.
Old broken up concrete, refrigerators, bricks..etc
If the compost is ready, it's just like dirt (except better) so it might work if it doesn't heat up.

EDIT: or maybe mix your clippings with sand or dry concrete to fill.