Rough-In Inspection: A building inspection conducted after the structural framing, plumbing, and electrical systems are installed but before walls are insulated and closed with drywall, allowing inspectors to verify that hidden work complies with applicable codes.
Why Rough-In Inspections Happen Before Walls Close
Once drywall is installed, the plumbing, wiring, and structural framing inside your walls is hidden. Inspecting this work before it's covered is the only practical way to verify code compliance without destructive investigation. Closing walls before the rough-in inspection passes is a common cause of stop-work orders and the need to reopen finished walls for reinspection.
What Gets Inspected at Rough-In
Framing inspection: Verifies that structural framing is complete, properly sized, and connected — studs, headers, beams, joists, and sheathing. Checks for proper fire blocking and draftstopping.
Rough plumbing inspection: Verifies drain, waste, and vent (DWV) system installation, supply line routing, and pipe supports. Plumbing systems are often pressure-tested at this stage.
Rough electrical inspection: Verifies wire sizing, box fill calculations, proper grounding, and circuit protection. Checks for GFCI and AFCI protection requirements in applicable locations.
Rough mechanical inspection: For HVAC systems, verifies duct installation, equipment location, and combustion air supply for gas equipment.
Scheduling Rough-In Inspections
Schedule your rough-in inspection through your building department's online portal or phone system as soon as work is ready. Most departments book inspections 1–5 business days out. Have the work genuinely ready before scheduling — an inspection failure means rescheduling and additional delays. For large projects with multiple trades, coordinate timing so all rough-in work is ready simultaneously when possible.