A gilded wardrobe flatpack can be made at a workbench (Bench with lathe only) in the workshop of a player-owned house. Like when making the normal Gilded wardrobe, this requires 87 Construction, uses 3 Mahogany planks, 1 gold leaf and gives 720 experience. The flatpack can then be used on a wardrobe hotspot in a Bedroom, either in building mode or not. This requires no Construction level and gives no experience.
The cost of making and selling a gilded wardrobe flatpack from scratch gives a profit of: -41,889
After completing the hard Fremennik achievements, they can also be traded to Advisor Ghrim in exchange for ? coins being added to your kingdom's coffers in Miscellania. See Flatpack: Miscellania reselling for details.