When do you need a building permit? Any new structures or additions including porches, retaining walls over 4 feet high, roof replacements, window replacements, additions of exterior doors, interior remodels, or decks over 30 inches above grade need building permits. When the project is minimal, a Miscellaneous Permit (PDF) may still be required.
There are two exceptions to the above list:
- Agriculture-related buildings that house farm implements, feed or livestock that are under 600 square feet and are only 2-sided or less.
- Accessory structures such as storage sheds or playhouses that do not exceed 200 square feet or one-story and that are non-habitable.
To find out if your project needs a building permit, please call our offices at 307-733-7030. Even if a Building Permit is not needed, a Planning Review may be necessary to comply with setbacks, maximum floor area and maximum site development standards.