When the wardrobe is full and the floor is taken, the remaining storage in a bedroom is all in places people overlook. In rough order of how much they hold:

Under the bed

The largest unused volume in most bedrooms. Shallow wheeled boxes are worth more than deep ones you have to drag out fully — you will actually use something that slides. Measure the clearance before buying; six inches is common and rules out most standard boxes.

The wall beside the bed

A narrow shelf or a wall-mounted lamp removes the need for a bedside table entirely, which can free up a foot of floor on each side. In a genuinely tight room this is the single biggest gain available.

Above the door

The strip of wall above a doorway is dead space in every house. A shelf there is out of the sight line, so it does not make the room feel busier, and it comfortably holds books or seasonal bedding.

The back of the door

Over-door hooks and shallow organizers cost very little and hold bags, scarves and dressing gowns — the exact items that otherwise end up on the floor or a chair.

Then reduce, honestly

If all four are full, the problem is volume rather than storage. The wardrobe test: anything not worn in a year, in a season that has been and gone, is not going to be worn. Boxing it up frees the space that no clever container will.

One thing to avoid

Tall storage at the foot of the bed. It blocks the sight line as you walk in, which makes the whole room feel smaller — the opposite of what you were trying to achieve.