If you live in a city, chances are your house or apartment is slightly cramped. You need extra furniture, especially if you plan to have house guests; at the same time, you need to save space, so filling up your rooms with clunky couches and tables isn’t going to work. If only furniture could adapt, or transform, to fit the moment—and not just a horribly heavy, horribly designed and horribly uncomfortable fold-out couch.

As it turns out, double-duty chairs, couches and tables exist. Trolling the web for transformative furniture, I came across some stunning examples of changeable, collapsible furniture on WebUrbanist, a blog about urban living.

As noted above, there’s nothing worse than a sofa bed—the thin mattress providing a worse bed than a carpeted floor—so U.K. furniture-maker bonbon trading came up with a solution perfect for overnight guests: a couch that turns into a bunk bed.

Of course, modular design isn’t everyone’s cup of tea, and more often than not you end up paying for the look, rather than the materials, especially when it comes to ubiquitous Swedish tastemakers IKEA; heirloom quality, not likely. However, even if you’re not quite ready to drop $4,750 on a coffee table–loveseat, you owe it to yourself to at least take a peek.