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.
You don’t need a dedicated laundry room when a large cupboard with space for a washing machine and tumble dryer works just as well. Maximise storage by slotting in cupboards and a rail for hanging clothes. Pick pocket doors that glide into a cavity in the wall if you don’t want doors to infringe on your space.