Trending Guest House Floor Plans 300 Sq Ft / They could serve as a guest bedroom with a vaulted ceiling separate from a main house or a kid's playroom to get all those toys out of your living room! Floor plans between 200 and 300 square feet are small and simple, making the homes easy and inexpensive to construct. Guest House Floor Plans 300 Sq Ft : We build unique, custom homes in gainesville, florida.