I would have The Ultimate Laundry - complete with stands for washing machine & dryer so I would never have to bend over again, a waist- height sorting/folding bench, a drying rack, and a spot for the ironing board. I would also have a storeroom/utility room, equipped with shelves for storing those bigger household things that you really don't want to have to go out to the spider-infested dusty shed for. And an extra, independently plumbed dunny so that there would always be at least one functioning toilet.