I don't have this exact set up but its a really cool way to add space in the laundry room. Plywood as a laundry room counter top, just rub on some danish oil. (add a cheap rubber floor mat between the wood and metal to dampen the sound)
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Basement bathroom door for cleaning supplies. Kitchen to basement door for pantry items. Back of girls' door for barbies. Inside girls' closet for shoes. Inside my closet door for belts and scarves. Entry door for shoes, mittens, etc.