Sometimes sofas have to be disassembled if they're being thrown out or moved to a new location and are too big to fit through doorways or windows in one piece. But despite their size, sofas aren't a particularly complex piece of furniture to figure out. And if you have the right tools, disassembly isn't particularly difficult, either. The one big negative to do-it-yourself couch disassembly is that if you're a novice, the process could take hours from start to finish.
Clear several feet of space around the sofa; you'll need the room when disassembling the piece of furniture, especially if the sofa's wide and/or long. Remove all pillows, cushions, slipcovers and all other objects that sit atop the sofa, and put them in a closet, another room or somewhere else out of the way.
Turn the sofa over so it is centred in the room with its legs are facing upward. Depending on the style of couch, you may be able to unscrew and remove the legs first by hand; if so, this is the first step to take.
Remove all padding, upholstery and other coverings from the underside of the sofa, if there are any. You can do this by using a semi-ripping tool like a staple puller, which will break the stitching yet leave the covering intact; or you can use a knife or box cutter to rip out the covering if you're not going to need it in the future and don't mind ruining it.
Most sofas come with removable bolts that disassemble at two or three major braces. Examine the frame and determine where the nuts, bolts, screws, hinges and other connectors are that hold the sofa together are. Use screwdrivers, pliers, staple pullers and other tools as needed to remove the screws, nails, hinges, etc. that hold the sofa together. After all these are removed, the sofa should be in two or three smaller pieces.