Thirty builders from across the country have been helping a Hertfordshire family as part of a special project.
The team are part of Band of Builders, a charity that helps other tradespeople by offering their services free of charge to make their lives a little bit easier.
They've spent the last week helping Carl Jenkins who's a plasterer from Hoddesdon. His little girl Sadie needs 24 hour care - she was born with a hole in her heart and needs machines to help her breathe.
They're transforming the front room where Sadie has to sleep, but also renovating the rest of the house and garden.
See how the project turned out below.