Enabling "Undo"

Is there any way you can up the priority on enabling "Undo?"

A few days ago, in a fit of newbie clumsiness, I managed to delete my house. Much to my chagrin, the Undo function doesn't work.

The good news, for me at least, was I had saved my house components and it was relatively simple, however, I'd hate to see someone else have a house (or other object) that was incredbily complex and, as they were linking the last components, only to accidently delete a large portion, or the entirety of them.

Thanks

Anything that is yours, that you delete, should appear in your trash folder. Go into your trash and simply drag it back onto the land.