What's the best storage for an awkward under-stairs cupboard?

An under-stairs cupboard is not a rectangular storage problem. Its entrance, sloping ceiling and inconvenient back corner often matter more than the advertised litres of any box.

The two products worth comparing first

Your priority	Specific product	Why it deserves a place	Reason to hesitate
First shortlist	IKEA SAMLA storage box with lid	Transparent stackable containers are an inexpensive way to organise the accessible end and let you see what is inside.	The rigid boxes may waste space in the tapered low corner, so measure the opening first.
Alternative	IKEA JONAXEL shelving combination	Open framed storage gives the taller section adjustable, accessible organisation without committing to a fitted installation.	The frame dimensions must leave enough room for the cupboard door and any service access.

The buying decision that matters

Tape a plan onto the floor, mark where the ceiling becomes too low to reach comfortably, and keep electrical panels, ventilation and stopcocks accessible. A roll-out unit is not useful if its handle cannot clear the door.

Measure the real room

Draw the cupboard profile on paper, including the sloping underside, door hinge arc, skirting and any pipes or meters. Measure the opening: a box that fits the cupboard may still not pass through its door.

Small details with big consequences

Allocate the low end to occasional items such as spare shoes or seasonal decorations; leave the reachable end for things used every week. Avoid closing off a stopcock, electrical board or ventilation opening with permanent furniture.

Our recommendation

Start with SAMLA boxes for occasional items and JONAXEL for regularly used things at the tall end. Bespoke drawers make sense only after you have lived with the layout and know the exact access problem.