Have a design in mind and know exactly what materials you need? Don't want a cluttered inventory? Folders will solve all your problems!
Folders that players can create like they can with blueprints. For example, I want materials to build a bedroom, so I make a folder called, "Bedroom 1". Within that folder, I can make other folders with different materials in them as well, that i plan to use to build all the separate parts of the room. I make a new folder within the "bedroom 1" folder and name it, "Floor". I place the block that I plan to use to make the floor into the folder.
Also the ability to name specific blocks that are within folders. Perhaps a option to add notes as well, such as planned sizes, etc!