Geoff's selling up in Spain to build a flood-resistant architectural marvel on a flood plain on the Essex coast. Will he sink or swim when Covid hits and Spain's property market collapses?

Rob and Ruth plan to transform a 200-year-old former blacking mill of historic importance into a new-build hybrid. But can they conserve its original atmospheric magic?

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?

Gretta plans to build a Malaysian-inspired pavilion, designed by her nephew, on her sister and brother-in-law's land in Ely. Will this family affair and story of renewal end in harmony?

Iain and Jenny plan to build an enormous black, minimalist, rectangular building in the middle of a country estate in the dramatic Scottish countryside. But what will the neighbours say?

Master carpenter Olaf faces the biggest challenge of his career: creating an oasis for himself and his partner Fritha on a tiny slice of land in Sussex near a mainline railway and A-road

Joe and Claire hope to create 'one of the greatest homes on the planet', that looks like a huge piece of art, with 34 enormous angled zinc shards. But the expensive build faces mind-boggling problems.