Other facts about accessory buildings:
- They must be limited to two plumbing fixtures.
- Are usually open-air structures, such as gazebos and trellises
- For zoning purposes, pools and spas are also considered accessory structures.
- Must be detached from the residence by a minimum distance of six feet. (This varies according to city or county planning departments.)
- Usually limited to one story.
- Zoning laws dictate maximum heights; 12 feet is a common limit, except if the structure has a sloped, pitched, gable or hip roof.
- In most municipalities, building permits are often required for all accessory buildings or structures greater than a certain square footage of floor area (or roof area for trellis type structures); for instance, 120 feet is a standard.
- Electrical/plumbing permits are required.