Mark Evans meets Mark and Holly in Chichester, as they design, build, launch and furnish a unique floating home in an area of outstanding natural beauty along the Chichester riverbank.

Mark Evans meets Dwayne and Janet, who have a dream to design and build an experimental oversized houseboat, so they can take their home with them anywhere on the vast network of UK canals.

Mark Evans follows British-born Steve King and his friend Rick Keith, who meet up in Maine, New England, every year to restore old boats. Now Steve wants to make his own tiny floating home, and he plans to spend no more than £7000 on it.

In Vancouver, Aaron and Heather thought a floating home was beyond their means. But when they find a company who can build them an affordable floating starter home, with stunning views of both the mountains and the city skyline, they dive right in.

Shirley and Russ want to join a community of 600 floating homes in Canada. They're set on a luxury ranch-style floating home with wraparound decks, but the launch is hair-raising - one slip and it will be a disaster.