Top Gear presenter James May has made a two-storey house out of more than three million Lego bricks.
More than 1,000 volunteers helped to build the whole house from scratch.
The building is 6m tall and has a working toilet, hot shower and a bed - not sure how comfortable it would be?
It was made for a TV show all about toys. It has lots of other home comforts too - like a pet cat.
The house was meant to be going to the Legoland theme park in Windsor.
But now bosses at Legoland say it's going to cost too much to move it.
Unless a new owner can be found the whole thing will have to be demolished.