Tim plans to move from his small flat in Bicester into an architecturally daring home at the UK's largest mass self-build site in Graven Hill. With the help of his dad Michael, the project is supposed to be a chance to spend quality time together outside of work but the stress begins to ramp up when the five-tonne car lift Tim ordered from China doesn't fit into the specially prepared hole in the basement. Plus, Kevin and Natasha revisit Jitinder, whose house was unfinished due to the moisture problems and his resin floor last time they met, now they experience the full splendour of his Hollywood Hills style home.

• Kevin McCloud