Grand Designs

Kevin McCloud follows a project to renovate and extend a classic 1920s cinema in Thorne, South Yorkshire. With little knowledge of restoration, Gwyn and Kate boldly set about turning the dilapidated building into a family home using masses of concrete after taking advice from an architect friend. The couple are hoping to create a hydraulic glass wall that opens up one side of the house to form a UV-filtered canopy, and there are also plans for a white roof extension that resembles a diving board.

Jonathan Broom, one of the founders of Ecoigo, and his wife Deborah have put everything on hold while he pursues his dream of building a miniature Hollywood Hills-style mansion. They stumble across a scrap of land in north London, but it's fraught with problems and the only way they can complete the £1million home is by sinking half of it six metres below ground. Surrounded on all sides by their neighbours' back gardens, the couple have to dismantle walls and fences and promise to put them back together again, and that's just the start of their difficulties. Kevin McCloud follows their progress.

Commercial architect Martin Walker and his art-director wife Kae want to build the ultimate family home near York, inspired by a giant farm shed. However, her idea for a warm and cosy design conflicts dramatically with his penchant for building large square warehouses, and finding something they both agree on proves extremely challenging on their tight budget. Kevin McCloud follows the couple's progress.

Marine captain Jon's life changed for ever when he stepped onto a land mine in Afghanistan and lost three limbs. After viewing many uninspired specialist homes and considering awkward conversions, he and partner Becky realised their best option was to build a property themselves. The design is cutting-edge, with sleek glass walls, open-plan spaces and a dramatic wing-like roof, and the couple want there to be no noticeable adaptations. However, they soon use up their budget of £250,000 and encounter problems with their incredibly tight schedule. Kevin McCloud follows their progress.

Colin Mackinnon and his partner Marta Briongos take on an ambitious project to build a bespoke metal home next to an airfield runway, designed by one of Scotland's most eminent architects and inspired by aircraft hangars. They have to contend with violent rain, snow, 100mph winds and the worst storms for 100 years, and the couple have to draw on their reserves of mental energy as what was supposed to be a 12-month build heads into a third year.

Kevin McCloud meets Tamayo Hussey, who has missed Japan ever since she moved to the UK 14 years ago with her husband, quantum physics professor Nigel. The couple want to transform a 1960s forester's lodge into a unique Japanese house, complete with a tatami room - decorated in her homeland's traditional style - sliding paper walls and a bath on the roof. Keen to keep costs down, they have decided to engage only the design skills - rather than the full services - of an architect, so with no previous building experience they tackle the project alone.

Ben and Rachel Hammond have spent a year searching London for somewhere exciting to live with their two daughters, and they have finally stumbled on a 1950s home on a unique plot, situated within the leafy depths of a park in the south of the city. The only problem is the house itself - an ugly, inefficient and uninspiring property - and their solution is to radically redesign it into a sleek, modernist masterpiece. But this is no easy task, as Kevin McCloud finds out.

Kevin meets Kevin McCabe who wants to build what may be the largest Cob structure in the world. With 6 metre-tall walls, McCabe fights a battle with the weather and his implausibly small £350,000 budget. He plans to form the huge property out of two vast curved roundhouses - the largest of which is inspired by the natural geometry of a snail shell - connected by glazing and topped with wildflower meadow roofs to mirror the surrounding countryside. However, the project involves mixing and laying a mind-boggling 2,000 tons of cob, all during warm, sunny weather - and the sheer scale of the task soon becomes clear.

Michael Butcher and Phil Palmer fell in love with Christmas Farm, near Newbury, and decided to give up their urban media jobs and move to the country. Michael and Phil want to bring a touch of urban glamour to their new home at Christmas Farm by creating a modern farmhouse that combines an open-plan party pad with functional spaces below. As the builders set to work on the handcrafted flint exterior, complete with a vast trapezoid window, the pair juggle construction with farming the land, and in an attempt to make the project work financially, they set up a microbrewery in the barn.

Around ten years ago Gil and Hillary Briffa retired to southern Spain. Instead of creating a home like the traditional old fincas in the area, their architect son designed them a confrontational, modernist glass box, surrounded by boldly colourful connected rooms, behind a giant citadel wall. A few years ago, Gil died, but now Kevin McCloud revisits Hillary to find out whether her home has settled into its landscape and how life is treating her as a British widow living abroad.

Six years ago Lucie Fairweather and Nat McBride began to build an affordable eco home in Woodbridge for themselves and their two young children. However, their journey was to be about more than bricks and mortar. Just before they got started, Nat discovered he had cancer, and after just a few months he died. Lucie decided to carry on with the project Nat had devised. Kevin McCloud returns to find out just how life has moved on for Lucie and to discover whether her wonderful and striking house has become part of the landscape.