George visits a cattle carriage made into a luxury holiday pad. There's a retro caravanette in east London and a picture-perfect home in southern Andalucía.
In Cornwall, Rebecca and Damian are trading in their house for an American trailer known as a Silver Streak. And in Torquay, George meets inspirational ex-cabbie Caroline.
A teenager in Lancashire turns a derelict narrow boat into a holiday home for the family. In Warwickshire, could a greasy burger van be the answer to a bride-to-be's prayers?
The ingenious builds this time include a gin bar made from a rail wagon, a narrow-boat conversion, and an epic cathedral near Madrid, hand built over 50 years by one man
George meets car nut Mark from Coventry, who's planning to build a camping trailer from an old Saab, and Busola who's making a mobile classroom out of a double-decker bus.
George and Will take their amphibious camper for a maiden voyage in Hastings. There's also a chill-out den, a sphere, and a revolutionary studio in Spain.
George and Will visit a secret ski lodge disguised as a boulder, a tree house that looks like a giant acorn, and a mountain-top restaurant resembling a spaceship.