you can buy free standing slim, tall cupboards from ikea - I have four in my dining room which house my humongous book collection!
our hoover is in a cupboard under the stairs (or in our bedroom, lying around!) and our ironing board leans against the wall in our dining room, but is hidden behind the coat rack, which is in the corner. Honestly, it doesn't look as messy as it sounds! it did move house when we had a new (bigger) fridge freezer, as it used to lean inbetween the wall and the FF.