Do I need a permit for pergola or trellis in Unincorporated Avery County?

It depends. Whether pergola or trellis needs a permit in Unincorporated Avery County comes down to the details of your project.

North Carolina has no pergola-specific rule. Section R101.2.2 of the Residential Code lists decks, gazebos, retaining walls, and detached carports among the accessory structures that must meet the code, but does not name pergolas. Under NCGS 160D-1110(c), work costing $40,000 or less on a single-family residence needs no permit unless it adds, repairs, or replaces load-bearing structure, adds or changes the design of plumbing, adds, replaces, or changes the design of heating, air conditioning, or electrical wiring or equipment (other than like-kind replacement of devices and light fixtures), uses materials the code does not permit, adds roofing, or involves the North Carolina Fire Code. An attached pergola, a solid or louvered roof on new posts and beams, or new wiring for lights or fans can take the project outside that exemption, so confirm with your local inspections department. A solid, waterproof or louvered roof turns an open pergola into a roofed structure, which departments generally review like a patio cover, with attention to roof framing and wind loads. An open lattice or rafter pergola is the version most often treated as minor, so if you are comparing designs, ask your department how it treats each one before you buy a kit.