Grand Designs: Cheltenham

Series 1, episode 0

Tim and Zoë Bawtree aim to become mortgage free by building an ultra-modern, low-maintenance house in the back garden of their Cheltenham town house. However, the garden is surrounded by grade two listed houses, and because of height restrictions, Tim and Zoë are forced to build 60% of their new home underground. The build is fraught with problems but even these are overshadowed when Tim and Zoë part company with their builder and take over the project themselves