Awaiting expert review. This page covers safety or regulatory rules that change over time. It is kept out of search results until a qualified reviewer has checked it; the sources below are dated so you can verify each point.
Quick answer
A rough-in inspection is a required building-department check of the plumbing, electrical, gas and mechanical systems a contractor has installed inside open walls, floors or ceilings, made before any of that work is covered, concealed or connected to fixtures.
It is one stop in a fixed sequence. In the model code, rough-ins pass first, then framing, and the final inspection comes last, after the work is complete and before anyone uses the space.
Quick facts
The key facts about Rough-In Inspection, with sources:
- Model code section
- 2021 IRC R109.1.2 (rough inspections) 1
- When it happens
- Before covering or concealment, before fixtures are set, and before the framing inspection 1
- Who asks for it
- The permit holder or their agent must call for it and give access 1
- Plumbing drain test
- Water, air or vacuum test held 15 minutes, no leaks 2
- Water supply test
- Working pressure, or 50 psi air for non-plastic pipe, held 15 minutes 2
- Next inspection
- Frame and masonry, after rough-ins are approved (IRC R109.1.4) 1
- Last inspection
- Final, after work is complete and before occupancy (IRC R109.1.6) 1
Key takeaways
- A rough-in inspection is the building department’s look at pipes, wires, gas lines and ducts while the walls are still open.
- The model code bars covering that work until the inspector approves it.
- Rough-ins come before the framing inspection, and the final inspection comes last, before you use the space.
- Plumbing rough-ins usually include a pressure or water test that must hold for 15 minutes.
- A failed rough-in is normal and fixable; covering work before it passes is the real problem.
Rough-in inspection in plain English
In building, “rough-in” is the stage when the hidden parts of a system are in place but nothing is finished. Drain and vent pipes run through the studs. Electrical cable is pulled to boxes.
Gas pipe and ductwork are hung. There are no sinks, no light fixtures, no drywall. A rough-in inspection is the inspector’s visit at exactly that moment.
The timing matters because this is the last time anyone can see the work. Once insulation and drywall go up, a bad drain slope or a missing nail plate is sealed inside the wall.
The 2021 International Residential Code (IRC) puts it plainly: rough inspection of plumbing, mechanical, gas and electrical systems shall be made prior to covering or concealment, before fixtures or appliances are set, and prior to framing inspection 1.
Most remodels that move a sink, add a circuit or reroute a duct trigger at least one rough-in. A paint-and-cabinets refresh usually does not, because that finish work is exempt from permits in the model code 1. Whether your job needs a permit is covered on our building permit page.
How a rough-in inspection works on a remodel
The model code sets the duties. Local departments add their own scheduling systems and checklists.
- The work reaches the stop point. Pipes, wires, gas and ducts are installed but nothing is covered 1.
- The permit holder calls for the inspection. It is their duty to tell the building official the work is ready and to give access 1.
- Tests are set up. For plumbing, the drain system is filled with water, put under air pressure or put under vacuum, and the water lines are pressurized 2.
- The inspector checks the work. They either approve that portion or tell the permit holder where it fails to comply 1.
- Corrections are made. Any part that fails must be fixed and may not be covered until the building official says so 1.
- Work moves to the next stop. Only after approval can the job go past that point 1.
- FoundationOnly if the remodel adds footings or a slab (R109.1.1)
- Rough-inPlumbing, electrical, gas, mechanical before cover (R109.1.2)
- FrameFraming, firestopping and bracing after rough-ins pass (R109.1.4)
- OtherInsulation or drywall checks a jurisdiction adds (R109.1.5)
- FinalWork complete, before occupancy (R109.1.6)
Order from 2021 IRC Section R109. Many jurisdictions add their own stops, such as an insulation inspection. Source: [1]
Types of rough-in inspections, by trade
| Rough-in | What is exposed | What the model code ties it to |
|---|---|---|
| Plumbing | Drain, waste and vent piping; water supply lines; shower pan liners | IRC R109.1.2; tests in P2503 1 2 |
| Electrical | Boxes, cable runs, protection where cable passes framing, circuit layout | IRC R109.1.2 1 |
| Mechanical | Ducts, exhaust fan ducts, equipment connections | IRC R109.1.2 1 |
| Gas | Gas piping, often under a pressure test | IRC R109.1.2 1 |
| Framing (follows rough-ins) | Studs, headers, firestopping, draftstopping, bracing | IRC R109.1.4 1 |
| Energy / insulation (where added) | Insulation and air barrier before drywall | Local “other inspection” under R109.1.5; IECC R402.4.1.1 1 5 |
Example: the plumbing tests at a bathroom rough-in
Say a remodel moves a shower and adds a second sink. Before the walls close, the 2021 IRC requires these tests on the new piping 2. Your inspector may accept another method that the jurisdiction allows.
| Test | Model-code requirement | Pass condition |
|---|---|---|
| Drain system, water test | Fill each section to at least 10 ft above the highest fitting in that section | Holds 15 minutes, no visible leaks 2 |
| Drain system, air test (non-plastic pipe) | 5 psi, or 10 inches of mercury | Holds 15 minutes without adding air 2 |
| Drain system, vacuum test (plastic pipe) | Negative 5 psi, or negative 10 inches of mercury | Holds 15 minutes 2 |
| Water supply lines | Working pressure of the system, or 50 psi air for non-plastic pipe | Holds at least 15 minutes 2 |
| Shower liner (built-up pan) | Lining material installed and turned up at jambs and thresholds | Approved before tile and setting bed 3 |
- 10 ftWater column for a drain water testIRC P2503.5.1
- 5 psiAir test on non-plastic drain pipeIRC P2503.5.1
- 50 psiAir test option for non-plastic water pipeIRC P2503.7
- 15 minHow long each test must holdIRC P2503
Source: [2]
The figures above are model-code minimums. Plastic drain pipe is not air-tested under pressure in the model code; it gets a water or vacuum test instead 2. Ask your plumber which test the inspector expects, and have it set up before the visit.
Where rough-in shows up: the permit card, the schedule and the contract
On the permit card. The permit or a copy must stay on site until the job is done 1. Inspectors record each approval, so the card is the quickest way to see which rough-ins have passed.
In the schedule. Rough-in is a hard stop. Insulation, drywall and tile cannot start in that area until approval. Our remodel timeline tool builds inspection waits into each phase.
In the payment plan. Many contracts tie a progress payment to a passed rough-in. That is a clean, checkable milestone. Our guide to remodeling contracts covers how to stage payments around inspections.
In the scope of work. A clear scope of work should say which trades need rough-ins and who schedules them.
Ask for a photo set before drywall
Ask your contractor to photograph every open wall and ceiling after the rough-in passes, with a tape measure in frame. Those photos show where pipes and wires run, which helps with future shelves, TV mounts and repairs.
What the rough-in stop gives you, and what it costs in time
What you gain
What a rough-in inspection does not check
An inspector checks code minimums at one moment. They do not check that the layout matches your design, that the shower valve is at the height you wanted, or that the outlet you asked for is on the right wall.
That is your job and your contractor’s. Walk the open walls with your plans before the inspection.
Passing rough-in is also not a guarantee of the finished job. Fixtures, trim and devices come later and are checked at the final. And the inspector may not open anything that is already covered, which is why covering work early is such a problem.
What drives inspection costs and delays
We do not list fees; each jurisdiction sets its own schedule 1. Inspection visits are usually part of the permit fee, and many departments charge extra for re-inspections. What really costs money is delay and rework.
The main drivers are simple. How many trades are involved sets how many rough-ins you need. How busy the department is sets the wait.
Whether the work is ready, tested and accessible sets whether it passes the first time. And whether anything was covered early sets whether walls must be opened again.
For how permit time and fees fit your budget, see our remodeling cost guide.
An inspection approval does not wear out like a material does. But it is tied to a live permit. In the model code a permit lapses if more than 180 days pass between inspections 1, so a stalled job can lose its approvals.
How to get ready for a rough-in visit
These are owner-level checks. The trades do the technical work.
- Confirm the permit covers every trade being roughed in, and that it is posted on site 1.
- Ask the contractor which inspections are booked, and when.
- Make sure test gauges, caps and water are in place for plumbing tests 2.
- Keep insulation and drywall out of the area until approval 1.
- Have the approved plans and any manufacturer instructions on site; the model code requires instructions to be available at inspection 1.
- Clear a path. The person requesting the inspection must provide access 1.
- Get the result in writing, including any correction notice.
After it passes: keeping the record useful
There is nothing to maintain on an inspection, but its paper trail is worth keeping. Save the inspection results, the correction notices and the photos of the open walls with your home records. If you sell, refinance or file an insurance claim, those records show the hidden work was inspected.
Before drywall, also note where the shutoff valves, cleanouts and junction boxes are. Access panels for valves and cleanouts should stay reachable after finishes go on.
Warning signs around rough-in
- Drywall goes up before you hear the result. The model code bars covering work until it is approved 1.
- No test on the new drains. Plumbing should be tested before it is concealed 2.
- A bid with no permit for moved plumbing or new circuits. That work is not an ordinary repair in the model code 1.
- Correction notices ignored. Failed items must be fixed and re-approved before cover 1.
- Long gaps between inspections. More than 180 days can void the permit in the model code 1.
Wiring, gas and structure stay with licensed trades
Do not change wiring, gas piping or framing yourself to “fix” a rough-in correction. Electrical faults and gas leaks cause fires and poisoning, and framing changes can weaken the house.
Have the licensed trade correct it and call for re-inspection. If old paint will be disturbed in a home built before 1978, the work must follow EPA lead-safe rules 6.
The rules behind rough-in: IRC, IEBC and local adoption
2021 IRC Section R109. R109.1.2 sets the rough inspection of plumbing, mechanical, gas and electrical systems. R109.1.4 sets the frame and masonry inspection after those rough-ins are approved. R109.1.5 lets the building official require other inspections.
R109.1.6 sets the final. R109.3 makes the permit holder call for inspections and give access. R109.4 bars work past each stop, or covering failed work, without approval 1.
2021 IRC Chapter 25. P2503.2 says plumbing may not be covered or used until tested, inspected and approved. P2503.5.1 sets the rough drain tests, and P2503.7 the water supply test 2.
2021 IEBC Section 109. For work on existing buildings, many jurisdictions use the International Existing Building Code. Its required inspections list includes footing or foundation, concrete slab or under-floor, frame, lath or gypsum board, and other inspections 4.
Local adoption. These are model codes. They bind only where a state or city adopts them, and Chapter 1 is often rewritten. Your department may add insulation, shear wall or pre-drywall stops. This page is held for review by a building official or ICC-certified inspector before it is indexed.
Rough-in vs other inspections and sign-offs
| Check | When | What it decides |
|---|---|---|
| Rough-in inspection | Systems installed, nothing covered | Whether hidden pipes, wires, gas and ducts can be covered 1 |
| Frame inspection | After rough-ins pass | Whether framing, firestopping and bracing are right 1 |
| Final inspection | Work complete, before use | Whether the permitted work is done to code 1 |
| Certificate of occupancy | After final, where required | Whether the building or part of it may be occupied 1 |
| Punch list | Near the end of the job | What the contractor still owes you under the contract, not the code |
From rough-in to final inspection
The final building inspection is the last stop in the same sequence. In the 2021 IRC, it is made after the permitted work is complete and before occupancy 1. For a remodel, that means fixtures set, devices and cover plates installed, smoke alarms working, and every correction from earlier visits closed.
A final inspection looks at what the rough-in could not: the finished fixtures, trim, guards, handrails and anything that went in after the walls closed. It does not reopen walls that passed rough-in unless there is a reason to.
Passing the final closes the permit. Where a certificate of occupancy applies, the building official issues it only after inspecting and finding no violations 1. Many finished-room remodels close with a final sign-off rather than a new certificate. Our permits and approvals guide covers close-out step by step.
Rough-in
- Walls and ceilings open
- Pipes, wires, gas, ducts
- Pressure and water tests
- Before framing inspection
Final
- Finishes installed
- Fixtures, devices, safety items
- All corrections closed
- Before occupancy
Source: [1]
Rough-in myths
- Myth If the inspector is late, the crew can keep going and cover it.
- Reality The model code bars covering or concealing work until the building official approves it 1.
- Myth A failed rough-in means a bad contractor.
- Reality Correction notices are common. What matters is that items are fixed and re-approved before cover 1.
- Myth Rough-in checks the design you picked.
- Reality Inspectors check code minimums, not layout or finish choices.
- Myth Small jobs never need a rough-in.
- Reality Moving or adding pipes, wiring, gas or ducts is not an ordinary repair in the model code, so it needs a permit and inspection 1.
- Myth Passing rough-in finishes the permit.
- Reality The permit stays open until the final inspection passes 1.
Why your inspection list depends on where you live
The sequence on this page is the model-code version. States and cities adopt the IRC or IEBC with amendments, and many add stops, such as a separate insulation inspection under the energy code, which lets the code official require third-party inspection of air barrier and insulation 5.
Who may pull the permit and call for inspections also depends on state contractor licensing rules. Check your building department’s inspection list when the permit is issued.
When rough-in should shape your decisions
Rough-in is your last cheap chance to change hidden work. Moving an outlet, adding blocking for grab bars or relocating a valve costs little with the walls open and a lot once tile is up. Walk the space with your plans before the inspection, then again after it passes.
Use it as a contract milestone, too. Tie a payment to a passed rough-in, and make the final payment depend on the final inspection. When you compare bids with our quote comparison tool, check that each one includes permits and inspections.
- If Job moves or adds pipes, wiring, gas or ducts
- Then Expect one rough-in per trade before walls close
- If Inspector issues corrections
- Then Licensed trade fixes; re-inspect before cover
- If You want changes to hidden work
- Then Make them before rough-in or ask for a re-inspection
- If Rough-in passed
- Then Photograph walls, then insulation and drywall can follow
Questions about Rough-In Inspection
What is checked at a rough-in inspection?
The inspector checks plumbing, electrical, gas and mechanical work while it is still exposed. In the 2021 IRC that inspection happens before anything is covered, before fixtures are set and before the framing inspection. Plumbing usually gets a water, air or vacuum test. Your jurisdiction’s checklist sets the details.
What comes first, rough-in or framing inspection?
Rough-in comes first in the model code. The 2021 IRC says the frame inspection is made after the plumbing, mechanical and electrical rough inspections are approved. Some departments let both happen on one visit, but the rough-ins still have to pass before framing is signed off.
Can drywall go up before the rough-in inspection?
No. The 2021 IRC says work may not be covered or concealed until the building official approves it, and failed parts stay open until fixed. Covering early can mean cutting open finished walls so the inspector can see the work. Wait for the written approval.
What happens if a rough-in inspection fails?
The inspector tells the permit holder what does not comply. The trade fixes those items, and the permit holder calls for a re-inspection. The work cannot be covered until it is approved. Failed items are common and are not by themselves a sign of a bad contractor.
How long does a rough-in plumbing test take?
Each model-code test must hold for 15 minutes. A drain water test fills the section to at least 10 feet above the highest fitting. An air test on non-plastic drain pipe holds 5 psi. Setup, filling and the inspector’s visit take longer than the test itself.
Who schedules the rough-in inspection?
The permit holder or their agent, usually the contractor. The 2021 IRC makes it their duty to tell the building official the work is ready and to give access. Your contract should say who books inspections and who must be on site.
What is the final building inspection?
The final inspection is the last check under a permit. In the 2021 IRC, it is made after the permitted work is complete and before occupancy. The inspector looks at finished fixtures, devices and safety items and confirms earlier corrections are closed. Passing it closes the permit.
Is a rough-in inspection required for a bathroom remodel?
It is if the remodel moves or adds plumbing, wiring or ducts, which most full bathroom remodels do. Swapping a vanity top or re-tiling alone is finish work the model code exempts from permits. Check your local exemption list, since jurisdictions amend it.
Does the inspector check where I wanted outlets placed?
Only against code minimums. The inspector does not check your design choices. Walk the open walls with your plans before rough-in so wrong locations can be moved cheaply. After drywall, every change costs more.
Sources
- ICC, 2021 International Residential Code, Chapter 1 Scope and Administration (R105, R106, R109, R110), retrieved .
- ICC, 2021 International Residential Code, Chapter 25 Plumbing Administration (P2503 inspection and tests), retrieved .
- ICC, 2021 International Residential Code, Chapter 27 Plumbing Fixtures (P2709 shower receptors), retrieved .
- ICC, 2021 International Existing Building Code, Chapter 1 Scope and Administration (Section 109 inspections), retrieved .
- ICC, 2021 International Energy Conservation Code, Chapter 4 [RE] Residential Energy Efficiency (R402.4.1.1), retrieved .
- U.S. EPA, Lead Renovation, Repair and Painting Program, retrieved .
Expert review
Written by the HyreRemodel Research team. Not yet reviewed by an outside expert. We say so rather than imply a review that has not happened; see our editorial policy.
How the numbers were checked: Inspection order, duties and approvals were read from 2021 IRC Section R109 and the certificate rule from R110 on ICC Digital Codes.
Plumbing test values from 2021 IRC P2503 and shower liner rules from P2709; the existing-building inspection list from 2021 IEBC Section 109; insulation third-party inspection from 2021 IECC R402.4.1.1; lead-safe work from EPA’s RRP page.
No fees are given. Held noindex until a building official or ICC-certified inspector reviews it.
Suggest a correction. We fix errors and say what changed.