From basic cottages and sheds with a few embellishments to more elaborate mini-mansions sporting all the architectural details, you're sure to find a free or reasonably priced plan for a do-it-yourself playhouse project among our collection of these spectacular designs. a few of these playhouses are for patient beginners with basic carpentry skills, some are hacks using purchased playhouses. Playhouse plans free how to build a playhouse plans free an outdoor playhouse is a fun project for any do-it-yourself amateur, as it is an opportunity to learn new carpentry techniques and create something unique for your kids..