Do I need a permit for basement finishing in Unincorporated Forsyth County?

Most likely yes. Basement finishing usually requires a permit in North Carolina. Confirm the specifics with Unincorporated Forsyth County.

Section R310.1 of the North Carolina Residential Code requires a basement to have at least one emergency escape and rescue opening, and each basement sleeping room to have its own. Basements used only for mechanical equipment and not over 200 square feet are excepted. Finishing an unconditioned basement into conditioned space falls under Section N1109.2. Projects costing more than $10,000 must put an extra 10 percent of the project cost toward energy conservation features, and cavities opened during the work must be insulated. Permitted alterations require smoke alarms and carbon monoxide alarms located as for a new dwelling (R314.2.2 and R315.2.2). New wiring, plumbing, heating or cooling, or load-bearing work is outside the $40,000 permit exemption in NCGS 160D-1110(c), whatever the project costs. This basement project adds a bedroom, a bathroom or wet bar, or new electrical circuits, or moves the furnace or water heater. Finishing work of this kind normally needs a building permit and the matching trade permits. A basement bedroom needs an emergency escape and rescue opening, such as an egress window or door, which is one of the most common reasons basement work fails inspection. Plan for framing, electrical and plumbing rough-in inspections before insulation and drywall go up.