Natasha Cargill wants to build a home shaped like two enormous periscopes in rural Norfolk, but to obtain planning permission, she has to ensure not only that the materials are sustainable, but also agree to measure the transportation used to deliver them. If these strict criteria are not met, she won't be allowed to live there, and to add to the pressure, she has just £330,000 to spend on construction and six months to complete the project.
Grand Designs is a Channel 4 TV series covering unusual architectural house-building projects, presented by Kevin McCloud.
The properties featured in the series vary wildly from homes underground to converted water towers, with the only common factor being that they're all rather unusual or extravagant in some way.
Grand Designs - Norfolk: Super Eco Periscope House Synopsis and Schedule