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

Kevin continues in his epic battle to build his very own Grand Design of visionary homes. But as the schedule slips residents start to grumble. As part of the Great British Property Scandal Kevin McCloud tries to prove that it shouldn't cost any more to build homes that are a lot nicer to live in. As he nears the end of the his five-year project to build beautiful, affordable, eco homes for the same price as low cost social housing, Kevin has become convinced that good design can help us live happier, more sociable lives. In an extraordinary social experiment, Kevin wants to create a new kind of development, where neighbours share vegetable gardens, grow fruit trees and look after their own central village green. So Kevin and his partners start team-building exercises to get private and council tenants working together. But has Kevin done enough to sow the seeds of a strong community? And more importantly what will people think of his visionary homes?

In the celebratory episode, stalwart host of Grand Designs Kevin McCloud, reveals a closely guarded secret – his top five buildings from over the years. In revisiting the buildings and the people that have inspired him most, Kevin ruminates on what makes a truly great Grand Designs project, while revelling in the brilliant architectural mix of inspiring homes.

To mark 25 years of the nation's favourite homebuilding programme, Kevin McCloud celebrates the triumphs and commiserates the disasters as he looks back at some iconic moments.

To mark 25 years of Grand Designs, Kevin McCloud reminisces on the wins and commiserates the disasters as he recalls some iconic moments on Grand Designs.