Dan and Nina want to build a unique family home, but their plot is dominated by a pond filled with local drainage. Will their West Sussex house be sublime and sleek or a Shrek-like swamp?

Kevin McCloud meets architect Iain and his wife Jenny, who intend to build an enormous black minimalist house right in the middle of a 19th-century Scottish country estate. Their grand vision also involves connecting the new rectangular block to a dilapidated gardener's bothy - and the neighbours are watching.

Kevin McCloud meets master carpenter Olaf, who is facing the biggest challenge of his career - creating an oasis for himself and partner Fritha on a small slice of land in West Sussex, which happens to be surrounded by a mainline railway and a busy A-road. Not only that, but half of the plot can't even be built on due an underground mains sewer. All they're left with is a very small triangle on which to build their future life together. With £190,000 in the bank, Olaf and Fritha must use all the ingenuity they can muster to make their triangular three-bedroom house come to life.

Kevin McCloud visits a couple planning to build a home that looks like a work of art overlooking a valley in south Devon. Joe and Claire's new home will be a giant sculpture inspired by the local landscape, 70 metres long and featuring 34 enormous angled zinc shards jutting out in all directions. It will also be complicated to build and equally as expensive. And although Joe is wealthy, ambitious and fearless, his team quickly come up against problems and the budget virtually doubles the first walls go up. Is his dream home in danger of become a nightmare?