We live in a small town home. The entire footprint is 20X26, with three bedrooms and a full bath upstairs, living room, kitchen and half bath on the main floor, and an unfinished cellar. Each bedroom has a "hanger's width", bi-fold door closet, the largest of which is in the master and is about six feet long. The bathroom has a small linen closet and a two door, three drawer vanity.
The kitchen is a good size - 12X20 - but EVERYTHING, and I do mean everything, is in one corner. Dishwasher, range, sink and all cabinets. There are three upper deck three lower cabinets, one upper and one lower being the corner type that has all that useless, unreachable, dark space. There is also the standard double under sink cabinet and a very small double cabinet over the range hood that the vent runs through. Very little storage for the size of the kitchen. We have added a double door jelly cabinet and a free standing double door cabinet to increase storage. The half bath has a small vanity.
We put four large metal shelves in the cellar. One is used mostly as a pantry, my son uses one for his hobby collectibles, and the others are used for storing various other things. We also have a portable closet for my husband's hunting clothes, and have devised other unique ways to neatly store our things.
We have found the secret, at least for us, to storage when there is seemingly no room is:
neatness
organization
continual purging of outdated/broken/unwanted items
Hugs . . .
Life is tough, but I am tougher!!