Colin Mackinnon and his partner Marta Briongos take on an ambitious project to build a bespoke metal home next to an airfield runway, designed by one of Scotland's most eminent architects and inspired by aircraft hangars. They have to contend with violent rain, snow, 100mph winds and the worst storms for 100 years, and the couple have to draw on their reserves of mental energy as what was supposed to be a 12-month build heads into a third year.

Ben and Rachel Hammond have spent a year searching London for somewhere exciting to live with their two daughters, and they have finally stumbled on a 1950s home on a unique plot, situated within the leafy depths of a park in the south of the city. The only problem is the house itself - an ugly, inefficient and uninspiring property - and their solution is to radically redesign it into a sleek, modernist masterpiece. But this is no easy task, as Kevin McCloud finds out.