The topic of space requirements is very debatable. When we moved in together, we promised each other to first check the usefulness of every item that was to be placed in the storage room/cellar. Usually, it was then determined that we actually no longer needed it, so we have always needed little space. But since things are quite different with children, we still don't know how we want to approach the topic. We would prefer to build openly and without a cellar and use the utility room space for storage. But will that be enough? But fortunately, the topic is not yet finalized.