Being able to design custom furniture anyone?
A special class maybe an upgrade for the carpenter would take a template that you could make or download and build the decor/furniture that is shows.
For Example:
I design a special chest of drawers through a similar program modders use to design their modules and items form their mods.
Then I add it too a certain file or drop box that will go straight to the crafting UI for the crafter to use.
Or
I could download a specially designed piece of decor from someone else and transfer it to a file or drop box that would appear to the crafting UI so the crafter can construct it.
Of course there would be limits as to how many resources it takes to craft it.