Channel 4’s fantabulous program Grand Designs featured an Underground House in the third series, so this evening I watched the show via 4OD and took copious notes! Here’s what I found out as I watched. They built their house in a conveniently house-sized gap in a quarry that was already dug. The guy said he wanted a house like that to both “hide away and not impose.” Sounds about right. She was more into the eco effort, which we are less worried about.