Grand Designs - Season 18 (2017)

An architect and his wife plan and do much of the actual building of a shed-like home outside Belfast.

Chris and Kayo live in a nice house in Hertfordshire. The only problem is it's adjacent to a secluded vacant lot that attracts youths engaged in disruptive behavior. Their solution is to buy the lot and build a house on it. Then they discovered it's an historic site with a multitude of restrictions.

The location is Herne Hill, SE London.

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.

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.

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.

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?