Kevin watches the progess made as artists Freddie Robins and Ben Coode-Adams leave behind their urban flat to convert a huge Grade II listed timber framed barn in Essex into a living and work space for themselves and their daughter.

Kevin meets Paul and Penny Denby who have lived on the same exclusive south London estate for the last 20 years. They are planning to knock down their million pound house to build a much bigger contemporary mansion with stark white render and huge expanses of glass.

Kevin follows the progress being made as Tim and Philomena O'Donovan, convert a lifeboat station in Tenby, Pembrokeshire, into a contemporary home.

Kevin watches the progess made as artists Freddie Robins and Ben Coode-Adams leave behind their urban flat to convert a huge Grade II listed timber framed barn in Essex into a living and work space for themselves and their daughter.

Kevin follows the progress made by estate manager Ed Waghorn and his wife Rowena, a couple who live an almost self-sufficient life with their four children on a smallholding in Herefordshire. They have been creating a timber-framed house using recycled materials.

Kevin follows the progress made by Adam Purchase and his partner Nicola Brennan as they attempt to renovate a dilapidated Grade II listed engine house which has planning permission to turn into a home.

Kevin follows the progress made by Claire Farrow and her husband Ian Hogarth who have always dreamed of building a home big enough to have their own dance floor and DJ booth.

Kevin catches up with Robert and Milla Gaukroger who when Kevin last saw them a year ago,were camping out in the incomplete shell of their ambitious Lake District home with their two children.

Kevin catches up with Richard and Sophie Hawkes when he returns to the Weald of Kent. The couple were attempting to build one of the most innovative houses ever featured on series, an experimental arch-shaped home built from clay tiles.

Kevin catches up with Denise and Bruno Del Tufo set attempted to transform a concrete water tower in their back garden into an avant-garde contemporary home six years ago.

Kevin catches up with Alan and Judith Dawson who during 2009 started to build their prototype, prefabricated home in the west of Cumbria.

Kevin catches up with Andre and Mimi, who three years ago, started to build a giant two-storey timber house, heated by state-of-the-art glass panels, in woodlands in Kent.

This special episode follows Kevin as he begins on an epic adventure to create his very own Grand Design.

Kevin continues with his epic adventure to create his very own Grand Design.