Grand Designs

Kevin meets a couple converting a listed mini-castle in Buckinghamshire into a family home. The Saxon burial ground the folly is built upon throws up some macabre surprises.

Harry and Briony are building an American modernist house inspired by 1980s teen comedy Ferris Bueller's Day Off. The project is big and proves challenging.

There are many reasons to self-build your own home. But saving lives must surely be one of the most vital. In southwest London, Elinor and Born want to construct Britain's first 'healthy' house, to alleviate the life-threatening allergies of their sons. Low toxin materials and an advanced filter system are required. But it's a race against time as the health of the children causes concern.

For some self-builders, new horizons are sought. Others are desperate to cling onto the past. Steph has sacrificed almost everything to build a contemporary farmhouse on her grandfather's old farmland and give her kids the blissful childhood she enjoyed. But the project leaks funds and soon she's forced to move into a trailer and completely reevaluate the entire scheme.

Identical twins Nik and Jon build near identical houses in Sheffield. Raised on steel stilts, these two extraordinary properties pay tribute to Sheffield's industrial past.

Deep-sea diver Adrian loves concrete. And now he wants to build his family home from the stuff. No cladding or carpet, just pure, exposed mortar. But the pioneering technique that he favors soon runs into trouble. As his funds evaporate, Adrian is forced to seek work and temporarily abandon the project. His concrete dreams are in danger of crumbling away.

Kevin returns to Devon to meet Kevin McCabe, who wanted to build one of the biggest houses ever on Grand Designs, out of mud. Seven years after it began, the cob castle is complete.