House extensions: Base rooms

Extending a property is always a hassle, what with planning permission, builders on site for ages and the cost involved in a project. If you aren't able to extend out or up (to an attic), a new company called the Base Room that I saw in the Times might be the answer. Most people don't have space for a large log cabin in the garden and basement rooms take up to six months to construct and cost a minimum of £100k. Bring in the Base Room. The idea is to create a room that sits just 200 mm out of the ground and looks as though it was part of the garden, a normal decking area - a wholly usable, soundproofed space. The great thing about these rooms is that, in the majority of cases, they don't require planning permission. Personally I'm thinking a home cinema room with a wine cellar, cheese tasting nook, bathroom and sauna (why not?!) would be pretty nice.