We currently have a tiny boiler/utility room, downstairs loo and a very small hall cupboard all next to each other. If we knocked the 3 into one we could create quite a large rectangular space off the hallway that would fulfill all these functions with the bonus of space where we currently have cramped.
I love the idea. But bearing in mind we have half a mind to move in 2-3 years, is this something that would appeal to you?