Kevin McCloud meets Kevin McCabe, an exponent of the ancient art of cob building, who wants to construct a castle entirely of mud. The huge scale of the task soon becomes clear. [AD,S]
Jonathan and Deborah are building a semi-subterranean, Hollywood Hills-style mansion with a swimming pool on a hemmed-in site in north London. But what will the neighbours think? [AD,S]
On the Isle of Skye, one of the most beautiful landscapes in Britain, Rebecca and Indi are building a turf-roofed contemporary home to withstand gale-force winds and some sceptical locals. [AD,S]
This episode follows actor Sean Simons' epic bid to turn castle ruins in Ireland into a spectacular fantasy home the hard way: with no architect and in the middle of a recession. [AD,S]
In 2019, Olaf and Fritha set out to build on a tricky slice of land in West Sussex, boxed in by an A-road and a train line. Kevin returns to see how their triangular triumph is faring. [AD,S]
In 2013, Jon and Noreen started building a giant treehouse in Gloucestershire. By 2016, the money ran out. Are they finally living up in the trees? [AD,S]
In 2015, Vicky and Ed set out to transform a derelict Somerset cowshed into a 21st-century smallholding. Now Kevin returns. How much did this wildly ambitious project change their lives? [AD,S]
Kate and Rob replace their 1940s past-it prefab with a bespoke, modern, factory-built home using volumetric modular construction. But will it feel like the characterful home they dream of? [AD,S]
In 2011, Edward and Hazel set out to build a lighthouse on the north Devon coast. By 2019, they were near bankruptcy with just a rusting shell. Three years on, has anything has changed? [AD,S]
Zimbabwean-born Davi and Matt from Australia set out to build a house in Home Counties suburbia with a radical multicultural design. Can they successfully balance a wide range of looks? [AD,S]
In Derbyshire, Mike and Sarah set out to build a multigenerational longhouse. But with a complicated roof, a shortage of materials and an unexpected bereavement, it proves far from easy... [AD,S]
Retired racehorse breeder John builds a million-pound, high-tech, accessible glass pavilion with a wildlife garden for him and his wife Helen, whose mobility was badly affected by a stroke. [AD,S]
In the longest revisit in Grand Designs history, Kevin McCloud returns to Devon to see if Sue and Martin's renovation of two ancient barns has finally come to fruition, two decades on. [AD,S]
Kevin McCloud revisits Adrian and Megan, whose dream home in East Sussex became a nightmare. With the house now fully complete, what is living in a cutting-edge concrete bunker really like? [AD,S]
Gretta plans to build a Malaysian-inspired pavilion, designed by her nephew, on her sister and brother-in-law's land in Ely. Will this family affair and story of renewal end in harmony? [AD,S]
Iain and Jenny build an enormous black minimalist rectangular building in the middle of a 19th-century country estate in the dramatic Scottish countryside. What will the neighbours say? [AD,S]
Have Paul and Carol finally finished their fortress-like home on the edge of the wild West Pennine Moors, several years after they ran out of money and time? [AD,S,W]
Nathan and Amye are building a giant cathedral-like home modelled on Dutch barn houses, with a sleek twist and a 5000-tile armadillo roof. But the pressure mounts on project manager Nathan. [AD,S]
Greg and Georgie plan to convert a cavernous, dilapidated, 35-year-old barn in Georgie's parents' garden in Kent into a peaceful safe haven. But costs start to spiral almost immediately. [AD,S]
Can Leigh and Richard transform a derelict 17th-century Cornish flour mill, full of rotten timbers and riddled with structural cracks, into a warm, contemporary four-storey home? [AD,S]
Rebecca and Gregory have a highly ambitious plan to transform a small, damp, single-storey bungalow in Cornwall into a cutting-edge home, and are determined to do much of it by themselves. [AD,S,W]
Master carpenter Olaf faces the biggest challenge of his career: creating an oasis for himself and his partner Fritha on a sliver of land in Sussex squeezed between a railway and an A-road. [AD,S,W]
While recovering from leukaemia, Toby planned a radical new home - wrapped around an ancient oak tree - to improve his health and provide for his family. But building it isn't easy. [AD,S]
Dan and Nina want to build a unique family home, but their plot is dominated by a pond filled with local drainage. Will their West Sussex house be sublime and sleek or a Shrek-like swamp? [AD,S]
Kevin McCloud revisits Strathaven in Scotland, where flying instructor Colin and trapeze enthusiast Marta built an incredible metal home inspired by aircraft hangars on their own airfield. [AD,S]
Cumbrian couple Rob and Ruth plan to transform a 200-year-old former blacking mill of historic importance into a new-build hybrid. But can they conserve its original atmospheric magic? [AD,S]
Andy and Jeanette attempt a precarious clifftop build on the west coast of Scotland. There are battles with extreme weather, overrun budgets, an emotional shock and a last-minute change. [AD,S]
In Devon, Joe and Claire hope to create 'one of the greatest homes on the planet' that looks like a huge work of art. But from the start, the expensive build faces mind-boggling problems. [AD,S]
Energy conservationist Andrew plans to build a radical, self-heating home by storing the warmth of the summer sun in insulated earth banks. But will this gigantic thermal experiment work? [AD,S]
Harry and Briony are relocating to Cornwall and building an American modernist house inspired by 1980s teen comedy Ferris Bueller's Day Off. But it's a huge and challenging project. [AD,S]
Ship's captain Dorran promised his family he'd build a super-modern underground lair on a hill outside Canterbury. But as the epic build hits choppy waters, will Dorran fulfil their dream? [AD,S]
Kevin McCloud meets Jaime and his wife Mimi, who are converting a listed mini castle in Buckinghamshire into a family home. But will their wildly optimistic schedule be a problem? [AD,S]
Design engineer Mark, who has paralysis from the waist down, plans to build a cutting-edge, accessible family home for £600k. But it's a huge emotional strain for him and his wife Penny. [AD,S,W]
Adrian and Megan plan to build a concrete home in Sussex. No carpets, no plaster - just concrete, inside and out. And with cutting-edge technology that's never been used for houses before. [AD,S]
Young architect and shed fanatic Micah Jones plans to turn a dilapidated agricultural building into an upside-down four-bedroom home in County Down's rolling countryside. [AD,S]
Stuart and Rosie turn their 1960s bungalow on the Wirral into a slick piece of 21st-century architecture. But what will the neighbours make of their ultra-modern wooden design? [AD,S]
Fred and Saffron build a family home on a steep slope in the Peak District, with the top floor in plain sight and two post-industrial-style floors buried into the thick limestone below. [AD,S]
Joe and Lina are fed up with renting but can't afford to buy. So they're building their own clever, space-saving two-bedroom home for £160,000, on a tiny plot in east London. [AD,S]
Paul and Amy Wilkinson build a lakeside home in Lincolnshire with five circular timber buildings linked by raised walkways. But Paul's health suffers as he struggles to finish it in a year. [AD,S]
Despite a lack of experience, former RAF pilot Jon project manages the construction of a three-storey upside-down home clinging to a steep slope in the Malvern Hills in Worcestershire. [AD,S]
Steph and her husband Alex plan to build a contemporary farmhouse on Steph's grandfather's old farmland. But a lack of money leads to a long spell in a caravan and a total redesign... [AD,S]
Edward and Hazel plan to build a shining white art deco lighthouse on a rugged but beautiful clifftop in north Devon. But almost immediately, their wildly optimistic plan runs into trouble. [AD,S]
Architect David Parsons has designed a sleek, black-clad house hidden away in an idyllic Essex woodland. But will having no windows on two sides make this dream home into a bunker? [AD,S]
In north London, Mark and Penny seek to blend period and cutting-edge architecture as they restore a derelict Victorian gatehouse on a steep hill, and add a giant black zinc-clad extension. [AD,S]
Tom and Danielle use their steam-bending skills to build a wavy wooden house full of twisty furniture in Cornwall. But with a relatively modest budget, have they taken on too much? [AD,S]
Paul Rimmer has worked with bricks for 40 years, renovating Victorian houses in Bolton. But now he plans to hand-build his own state-of-the-art wooden home - if his funding holds up. [AD,S]
Kevin McCloud meets Clinton from West Sussex, who's willing to spend whatever it takes to build one of the largest homes ever to feature on Grand Designs. [AD,S]
Richard and Felicia set out to turn a vast underground water reservoir near the Humber Estuary into a family home - an almighty feat of engineering. Then a life-threatening illness strikes. [AD,S]
Natasha Cargill wants to build a home shaped like two enormous periscopes near Norwich. But a limited budget and tight planning restrictions start to take their toll. [AD,S]