If the plumbing is there in the concrete where you need it for the peninsula, sure you can do a peninsula with Ikea or any other cabinet line. But if the plumbing has to be moved, then you've just lost and $$ advantage that Ikea gives you in your budget planning. And most often, people do a pony wall to contain the plumbing pipes and to give the cabinets something to attach to. You can still skin the pony wall with a cabinet skin and door panels if you want to dress it up.

Oh, okay. The plumbing is there already. Is it possible to do without a pony wall? I don't see how...