Well.... I just did this for a chair I had picked up on the curb (aka... garbage picked, lol!). It's a cool mid-century modern chair, but the cushions were nasty (they had a towel safety-pinned over them, they were stained and saggy... yuck). My upholsterer replaced the cushions and recovered the chair with some gorgeous fabric I picked out and now it is good as new (better than new, with my fabulous fabric!). It cost me about $180 to replace the cushions and reupholster (price does not include cost of fabric). Is this the type of info you were looking for?