I designed the ADU to be tucked back as a vertical element to create a cozy space for the hot tub area and not take over the space vertically if it were in other spots. By having it off to the side, it grounds the garden and becomes a destination as well as recedes rather than dominate the space. It acts as an office space. Keep in mind that you can always do heated flooring if you do a concrete pad or tile as we planned for in this space. Energy efficient and also saves on space. Deck chairs can be brought closer to the hot tub at social events. Modern shed by Eric Enns of Modern Spaces and Sheds.