How do you know which kind of permit — residential or commercial — your project requires?
Although the terms sound like they refer to the type of home or building you live in, “residential building permit” and“commercial building permit” actually refer to the international code standards that are used to review the permits, not how the building is used (such as home, retail or leases).
To have a project qualify to use a residential permit, the International Code Council (ICC) requires that buildings be detached one- and two-family dwellings or townhouses, not more than three stories above grade plane (ground-level) in height. Any project that doesn’t fall under those parameters will use a commercial building permit. View the current building codes.