Most permitted jobs run through a set sequence of inspection gates: a foundation or footing inspection before concrete, a framing inspection before anything is covered, separate rough-in inspections for electrical, plumbing, and mechanical before drywall, an insulation inspection, and a final inspection at the end that closes the permit. The exact list and order come from your building department and your scope, not from a national rulebook, so this guide gives you the standard flow and sends you to your AHJ for your specific gates. The one principle that never changes: you stop and get each stage inspected before you cover it up.
The golden rule: never cover uninspected work
Before the sequence, the rule that everything else serves. An inspector has to be able to see the work. Once you drywall a wall, backfill a trench, or pour a slab over rough-in, the work is hidden, and the inspector cannot approve what they cannot see. Cover uninspected work and you will be told to open it back up, on your own time and your own dime.
So the whole inspection schedule is built around one idea: the department checks the stuff before it gets hidden. Every gate below exists because something is about to be covered.
The standard sequence, gate by gate
Your permit lists your required inspections, but a typical residential or light-commercial job moves through these stages in this order:
- Foundation and footing, before the pour. The inspector checks the excavation, the footing size and reinforcement, and drainage rough-in before concrete goes in, because once it is poured, none of that can be seen or fixed.
- Framing, after the structure is up and the rough-ins are in. Called after all framing, blocking, and the mechanical, electrical, and plumbing penetrations are done, but before insulation and drywall. This is the big one, the inspector is looking at how the building is put together while it is still open.
- Rough-in inspections, often one per trade. Electrical rough (wiring, boxes, panel), plumbing rough (supply, drain, and vent piping), and mechanical rough (ductwork, equipment) are frequently inspected separately, each before that trade's work gets concealed. On many jobs these overlap with or sit just before framing.
- Insulation, before drywall. In jurisdictions that enforce the energy code closely, insulation and air-sealing are inspected before the walls are closed.
- Drywall or fire-rated assemblies, on some jobs. Less universal, but some departments inspect wallboard, especially fire-rated assemblies, before finishing.
- Final, at the end. After everything is complete, the inspector confirms the finished job matches the approved plans, fixtures are installed, and systems work. Passing final closes the permit and, for bigger jobs, produces the certificate of occupancy that says the building can be occupied.
Which of these your job needs, and whether some combine or split, is set by your building department. Get your exact gate list from the permit and confirm it with the department.
What each gate is really checking
You do not need to memorize dimensions to prepare for an inspection, and you should not, because the numbers depend on your adopted edition. What helps is knowing the intent of each gate:
- Foundation is about what holds the building up and keeps water away from it.
- Framing is about the structure and the safe path of the systems through it, connections, spans, bracing, blocking, and that the rough MEP did not compromise the framing.
- Rough-ins are about each system being installed correctly before it disappears into the walls.
- Insulation is about the energy envelope.
- Final is about the finished, occupiable result matching what was approved.
The specific measurements the inspector applies at each gate come from your jurisdiction's adopted code. This guide will not print them, because they change with the edition and the local amendments. Get them from the Permit and Code Lookup tool.
Scheduling: build the lead time in
Inspections are not on demand. Departments usually need advance notice to send an inspector, often a day or two, and same-day slots are rare. Two habits keep a job on track:
- Call ahead and sequence your trades around the gate. Do not finish rough-in on a Friday and expect to close the wall Monday. Book the inspection into the schedule.
- Have someone on site who can answer questions and fix minor items. A foreman or the trade partner present during a rough-in can often correct a small issue on the spot, turning a fail into a pass without a re-inspection trip.
The exact lead time and how to book are jurisdiction-specific, so get them from your building department when the permit is issued.
Common questions
What is a rough-in inspection?
A rough-in inspection checks a system, electrical, plumbing, or mechanical, after it is installed but before it is covered by insulation or drywall. It exists so the inspector can see wiring, piping, venting, and ductwork while everything is still open. Rough-ins are often done separately per trade, and they usually happen around or just before the framing inspection. You must pass the rough-in before you close the walls, so schedule it into the job rather than racing to cover the work.
What is the difference between a rough-in and a final inspection?
A rough-in inspection checks the parts of a system before they are covered up; the final inspection checks the completed, finished job at the end. Rough-ins happen mid-build, while walls are open, so the inspector can see wiring and piping. The final happens after everything is installed and working, and it confirms the finished result matches the approved plans. Passing the final closes the permit and can trigger the certificate of occupancy. You will typically have several rough-ins but one final.
Can I close up a wall before the inspection?
No. Covering work that has not been inspected is the single most common way to turn a smooth job into an expensive one, because you will be told to open it back up so the inspector can see it. The whole inspection schedule is designed around checking work before it is hidden. Call the rough-in, pass it, then close the wall. If you cover first, no photo or explanation substitutes for the inspector actually seeing the work.
What is a certificate of occupancy?
A certificate of occupancy, or CO, is the document a building department issues after final inspection confirming a building or space is complete, code-compliant to the approved plans, and safe to occupy. Bigger jobs, new builds, additions, and change-of-use, typically need one before anyone moves in or uses the space. Smaller permitted jobs may just get a final sign-off instead. Whether your job needs a CO, and what it requires, is set by your AHJ, so confirm it with your building department.
The honest bit
- The exact inspections your job needs, their order, how far ahead you must book, and what the inspector measures at each gate are set by your building department and its adopted code edition. This guide gives you the standard flow; get your specific gates from the permit and the Permit and Code Lookup tool.
- No code number appears here on purpose. What passes at each gate depends on your adopted edition and local amendments, so route every measurement to your AHJ.
- This is general guidance on how inspections work, not code interpretation. The inspector's reading of the adopted code is what counts on your job.
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