Jon and Noreen take on an epic self-build, creating a modern treehouse on a half-acre site in the heart of a Gloucestershire town.

Matt and Sophie want to build a giant family house of fun with secret dens, a fireman's pole and a James Bond room. Kevin can't wait to see the final outcome.

Tom and Danielle Raffield use their steam-bending skills to build a wavy, wooden house in Cornwall, full of amazing, twisty furniture. But with only 100,000 pounds, have they taken on too much?

After recovering from illness, artist Michelle Parsons and her architect husband David found a beautiful plot in an Essex woodland where David devised a sleek, black clad, three-bedroom house with a separate artist studio.

Bricklayer Paul Rimmer has spent over forty years restoring and renovating the dilapidated Victorian terraces of Bolton. Now he wants to hand-build a state-of-the-art contemporary home - not out of brick, but out of wood.

Can you really build a 'Grand Design' when you've only got 500 GBP? That's what Simon and Jasmine Dale had in the bank when they started their unique three-bedroom family house high up in the hills of rural Pembrokeshire.

Mark and Candida Diacono set themselves an ambitious schedule of just seven months to build their house and barn. The house has a timber frame and timber cladding, and the barn, an all steel frame and traditional Devon cob.

Stuart and Rosie Treasurer want to turn their '60s dormer bungalow into a generous 21st century piece of slick architecture on a budget. But the ultra-modern wooden box that sits on top upsets the neighbours. (Final)