Energy conservationist Andrew plans to build a radical, self-heating home by storing the warmth of the summer sun into insulated earth banks. But will this gigantic thermal experiment work?
Nathan and Amye are building a cathedral-like home modelled on local Dutch barn houses with a sleek twist and a 5000-tile armadillo roof. But the pressure mounts for project manager Nathan.
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 the building work soon squeezes their budget.
Justin plans to restore a neo-Gothic cemetery keeper's lodge and convert its toilet block into a luxury extension complete with a moat and swimming pool. But can he keep his budget under control?
Leigh and Richard plan to transform a derelict 17th-century flour mill, full of rotten timbers and riddled with structural cracks, into a warm, contemporary, four-floor, three-bed home
Six years on, Kevin returns to Scotland to see Colin and Marta's incredible metal home, inspired by aircraft hangars, now that the construction is finally finished
Edward and Hazel plan a shining white art deco lighthouse on a rugged beautiful clifftop. But almost immediately their wildly optimistic plan runs into trouble.
After recovering from leukaemia, Toby is driven to build a complex home around an old oak tree. But can he balance high architecture and health with a comfy family place?
Richard and Felicia almost singlehandedly turn an underground water reservoir in the Humber Estuary into a family home. It's an epic task. And then a life threatening illness strikes.
Design engineer Mark Butler is paralysed from the waist down and needs a cutting-edge, wheelchair-friendly family home. Making it for £600k proves a huge emotional strain.
Paul and Amy Wilkinson plan to build a lakeside home in Lincolnshire with five circular timber buildings linked by walkways. But Paul's health suffers as he struggles to finish in a year.
Andy and Jeanette plan a precarious cliff-top build on the west coast of Scotland. There are battles with extreme weather, budget overruns, and a sudden emotional shock.
To celebrate 20 years of Grand Designs, Kevin McCloud reveals his top five buildings from the show, revisiting the buildings and people who have most inspired him over 180 episodes
Kevin returns to Devon to meet Kevin McCabe, who wanted to build one of the biggest houses ever on Grand Designs, out of mud. Seven years after it began, the cob castle is complete.
Deep-sea diver Adrian Corrigall and his wife Megan want to build a concrete family home that Adrian hopes will be the ultimate 21st-century country house
Identical twins Nik and Jon build near identical houses in Sheffield. Raised on steel stilts, these two extraordinary properties pay tribute to Sheffield's industrial past.
Steph Wilson and husband Alex try to build a contemporary farmhouse on her grandfather's old farmland. But lack of money leads to a long spell in a caravan and a total re-design.
In a leafy spot in south west London, Elinor and Born want to build Britain's first 'healthy' house, to alleviate their sons' life-threatening allergies in a race against time
Harry and Briony are building an American modernist house inspired by 1980s teen comedy Ferris Bueller's Day Off. The project is big and proves challenging.
Kevin meets a couple converting a listed mini-castle in Buckinghamshire into a family home. The Saxon burial ground the folly is built upon throws up some macabre surprises.
Ten years in the making, Ed and Rowena Waghorn's handcrafted wood and clay house is the longest running Grand Designs ever. Is it finished and is it a masterpiece?
Joe and Lina's clever space-saving build may be the smallest two-bedroom house you're allowed to build in London, but it'll be stylish, low-budget, and theirs - not a landlord's
Fred and Saffron build a home in the Peak District on a 30 degree slope, with the top floor in plain sight and two post-industrial style floors buried into the thick limestone below
In the beautiful Blackdown Hills, engineer Stephen and horticulturalist Elizabeth are building one of the most ambitious homes ever seen on the show, inspired by a shell
Beth and Andrew rescue a crumbling Victorian dairy, hoping to make it into a 'shabby chic' family home fit for modern life. But is the building simply too derelict?
Chris and Kayo build an intricate, radical and complicated home on protected land close to one of Britain's most historic abbeys
Young architect and shed fanatic Micah Jones tries to turn a dilapidated agricultural building into an upside down, four bedroom home in the rolling countryside of County Down
Penny and Mark Edwards seek to blend period and cutting edge architecture restoring a derelict Victorian gatehouse perched on a very steep hill
Ex-RAF pilot Jon take on the project management of building an upside-down home clinging to the side of a hill in Worcestershire. It proves an emotional rollercoaster ride.
Kevin returns to Somerset to see Ed and Vicky and their off-grid cowshed conversion, which they turned into a home and a business space
A couple turn their 1960s bungalow into a slick piece of 21st-century architecture. But what will the neighbours make of their ultra-modern wooden box?
Mark and Candida Diacono are building a house in the shape of a plough in Devon using a non-conventional team of builders. Will their ambitious plans lead to disaster or success?
Simon and Jasmine Dale want to build a three bed home on a hill with only £500 in the bank. And be self-sufficient in five years. Can it be done?
Paul Rimmer has worked with bricks for 40 years renovating Victorian houses in Bolton. But now he plans to hand-build a state-of-the-art wooden home. If his funding holds up that is.
Architect David Parsons has designed a sleek, black house hidden away in an idyllic Essex woodland. But will having no windows on two sides make this dream home into a bunker?
Tom and Danielle Raffield use their steam-bending skills to build a wavy wooden house in Cornwall, full of amazing twisty furniture. But with only £100k, have they taken on too much?
Matt and Sophie want to build a giant family house of fun with secret dens, a fireman's pole and a James Bond room. Kevin can't wait to see the final outcome.
Jon and Noreen take on an epic self-build, creating a modern treehouse on a half-acre site in the heart of a Gloucestershire town
Kevin McCloud catches up with one of his favourite ever Grand Designs: Rebecca and Gregory's radical, experimental timber refurb of an old bungalow
Kevin returns to one of the most ambitious Grand Designs ever, a million-pound amphibious house on the Thames. Now it's finished, does it actually float?
Kevin meets Stephen Yeoman and Anita Findlay, who plan to build a cutting edge, post-industrial house covered in bright orange rusty metal. What will the neighbours think?
Can a pair of first timers really turn a cowshed into a warm, cosy home by learning everything from the internet? Kevin McCloud visits an extraordinary build in Somerset.
Michele and Michael want to transform a derelict 100-year-old blacksmiths in County Antrim, on a tiny budget and by hand. But the odds and the weather are stacked against them.
Angelo Mastropietro plans to almost single-handedly build himself a 21st century cave in a damp, dark abandoned space - a retreat to help him cope with a recent diagnosis of multiple sclerosis
After recovering from a brain haemorrhage, Bram Vis and his wife Lisa want to build a beautiful cutting edge family house by the sea. But their budget starts to climb.
Architect Ben Hebblethwaite wants to build a nautical home for his boat-loving uncle, James Strangeways, that floats on stilts. But a contractor problem puts the project at risk.
Kevin meets Clinton from Sussex who's willing to spend whatever it takes to build one of the largest homes ever featured on Grand Designs
Kevin looks at the challenges of self-building in the great British countryside, meeting the pioneers transforming agricultural and historic buildings with cutting-edge thinking
Using footage from the best Grand Designs suburban builds, and new interviews with architectural experts, Kevin McCloud reveals the designs which have reinvented the suburbs
Kevin looks at the challenges of self-building in the UK's most remote places, meeting the architectural pioneers going to astonishing lengths to live on the edge of society
Kevin McCloud draws on 15 years of Grand Designs to look at the challenges of self-building in the city. With new visits and new interviews, he reveals which designs work best and why.
Kevin McCloud returns to Devon for an update on Marine Captain Jon White and wife Becky's cutting-edge, semi-open plan building, adapted for Jon's post-Afghanistan war injuries
Kevin McCloud returns to a unique Japanese-Welsh fusion home in the Wye Valley to see how the improvised building weathered one of the wettest winters on record
Kevin McCloud returns to a remote part of France and the restoration project of a dilapidated manor house that Denise Daniel and Doug Ibbs started back in 2003
Andy and Nicki Bruce try to build an experimental flood-proof floating house on an island in Buckinghamshire. But building such a complex design on a site with limited access isn't easy.
Natasha Cargill wants to build a home shaped like two enormous periscopes in Norwich, but a limited budget and tight planning restrictions start to take their toll
Tracy Fox and husband Steve want to build an 'urban shed' out of industrial materials in an old milk yard in south east London. But the choice of unorthodox materials proves challenging and costly.
A young farmer and architect in Northern Ireland hopes to make a home out of four large shipping containers welded together to form a giant cross. But his tiny budget is soon under threat.
Peter Berkin and his wife Chard have decided to build a new home at the bottom of their garden. Problem is, right from the start they can't agree on any part of the design - even the basic shape.
Rebecca Sturrock has returned to her family home in Cornwall, with her partner Gregory Kewish and an ambitious plan. They will transform a small, damp bungalow into a cutting-edge home.
Rob and Kay want to build a sleek glass-fronted villa high on a cliff top that erosion specialists predict will fall into the sea
Having already made one programme about amateur self-builder Tom Perry, Kevin McCloud returns to find out the latest about his extraordinary project, now a year behind schedule.
Kevin McCloud catches up with Lucie Fairweather to view the striking, modern house in Woodbridge designed by her partner Nat, who passed away prematurely
Kevin catches up with the story of a daring modernist home in the Andalucian hills in southern Spain, as he revisits Gil and Hillary Briffa after 10 years
Confirmed city dwellers Michael Butcher and Phil Palmer have moved to the country to run a farm, start a micro brewery and create a vast, dramatic 21st-century farmhouse to live in
Kevin meets Kevin McCabe, the leading exponent of the ancient art of cob building, whose dream is to build a castle made entirely of mud. But soon the sheer scale of the task becomes clear.