Structures like sheds, extra garages, detached workshops, and even pools and pool houses are often forbidden or severely controlled through deed restrictions. If they are not forbidden outright, they could be restricted in the same ways that houses are restricted: in terms of design, size and location on the property. Even if there are no specific restrictions on how structures can be designed, deeds often contain restrictions on what percentage of the property can be built. Like the restrictions on the house, covenants for adjacent structures can be extremely finicky. There have even been cases in which HOAs have insisted that children's tree houses be disassembled [source: Pace]. So when you're looking for land to build your house, make sure you consider any other buildings or structures that are necessary to living the dream.