A couple who live in a Regency house in Cheltenham that is expensive to run decide to sell up and build a modern low maintenance house in their back garden. However, height restrictions mean they have to build 60 per cent of their new home underground and neighbours make 90 complaints about their planning application. Undeterred, the pair continue as planned, but the project encounters further problems including the departure of the builders.

Henry Chopping finds his plans to build a new home in Oxford hampered by a listed wall and planning restrictions. With a budget of over three quarters of a million Henry is determined to make his dream home a reality.

An architect plans to build a new house for his family using only white materials. He ends up using stuff more commonly used in commercial buildings.

Jo and Shaun Bennett want to build an Addams Family style Gothic house with a £400,000 budget. With the challenge growing bigger than they ever imagined they face financial problems and struggle to stay within their budget.

Pru and Richard make plans to build a bespoke family home on an industrial site in the middle of the Midlothian countryside.

However, the plot of land, an old industrial site complete with lime kilns, comes with a condition. They can build on it only if they become custodians of the kilns, and more importantly, that the house they build blends in with the landscape.

Kevin attempts to help Tiffany and Jonny with their dream of creating an ultra-modern, eco-friendly home in Bath in the west country.

Rather than go down the traditional building route, Tiffany and Jonny opted for a German pre-fabricated kit house with great green credentials.

Kevin McCloud revisits artists David Westby and Leonie Whitton three years after they bought an olive farm in the Puglia region of Italy and planned to convert it into a home on a budget of £25,000.

Kevin McCloud drops in at John and Terri Westlake's self-built, contemporary wooden home, which has a wall made entirely of glass and great views across open countryside near Peterborough.

Kevin revisits David and Greta Iredale, who replaced their original house which they designed and built themselves with a German built, precision engineered Huf Haus.

Kevin McCloud revisits Philip Trail and his wife Angela who moved to stress-free Surrey and renovated a 150-year-old threshing barn after Philip was diagnosed with a brain tumour.

In Maidstone, Jean and Bill Letley, a septuagenarian couple plan a highly contemporary bungalow complete with underfloor heating and prototype steel foundations. The project would test even the most accomplished workmen, but is left to their daughter and son-in-law, who have little building experience and have to make personal sacrifices.