An electrical final inspection is the building department’s last look at your wiring before the permit closes, and it decides whether the space can be legally occupied. A local inspector walks the system, tests every safety device, and measures the work against the edition of the National Electrical Code your jurisdiction has adopted.1NFPA. NFPA 70 (NEC) Code Development Pass, and the permit closes and, on new construction, the certificate of occupancy can follow. Fail, and you fix the correction list and pay to bring the inspector back.
Confirm Which Code Edition Applies
The inspector evaluates your work against whichever NEC edition your jurisdiction has adopted, plus any local amendments that add to it.2NFPA. Learn Where the NEC Is Enforced Adoption is not uniform across the country: some states are on the 2023 edition, others still enforce the 2020 edition, and a few operate under older versions. Your permit usually names the applicable code year. Check it before you buy materials, because building to the wrong edition is one of the fastest ways to fail.
Get the Job Ready Before You Call
The whole system needs to be finished and energized when the inspector arrives. Fixtures hung, switches and receptacles wired and functional, every cover plate installed. A blank box or a temporary connection is enough to stop the inspection, and in most jurisdictions a wasted trip triggers a re-inspection fee.
Have the original permit on site and accessible. If your project required a rough-in or other earlier inspection, that approval must be documented on the permit card or in the digital inspection record. An inspector will not proceed with the final if a prior inspection is missing or was failed and never corrected.
Homeowners who pulled their own permit should confirm they meet the self-performance rules for their jurisdiction. Some places allow limited electrical work on a primary residence, some require an affidavit, and nearly all require the same inspections a licensed contractor would face.
The service panel needs a legible circuit directory identifying each breaker’s purpose. The NEC requires every circuit to be clearly and specifically identified so it can be distinguished from all others, and descriptions can’t rely on temporary conditions like who currently sleeps in which room. Spare positions get labeled as spares. The directory sits on the inside of the panel door or immediately next to it. The code says “legibly identified” without dictating a format, but inspectors reject handwriting they can’t read, so typed or neatly printed labels are the safe standard.
What the Inspector Actually Tests
The walkthrough moves systematically from the main service panel out through each branch circuit in every room. The inspector uses a handheld circuit tester at outlets to verify polarity and grounding, presses the test buttons on safety devices, opens junction boxes to examine connections, and confirms that everything is secured and enclosed.
GFCI Protection
Ground-fault circuit interrupters cut power within milliseconds when they detect current leaking through an unintended path, such as through a person touching a faulty appliance near water. The NEC requires GFCI protection on 125- through 250-volt receptacles in bathrooms, kitchen countertop locations, garages, outdoor locations, basements, crawl spaces, laundry areas, areas near sinks, and indoor damp or wet locations. The inspector presses the test button on each device. A GFCI that will not trip is an automatic failure.
AFCI Protection
Arc-fault circuit interrupters detect the kind of arcing caused by damaged or deteriorating wiring and shut the circuit down before a fire starts. Under the 2023 NEC, AFCI protection is required on 120-volt branch circuits serving kitchens, family rooms, dining rooms, living rooms, bedrooms, dens, hallways, closets, laundry areas, recreation rooms, sunrooms, and similar spaces. That covers nearly every habitable room. The inspector verifies that the correct breaker is installed and that it trips on demand.
Tamper-Resistant Receptacles
All 15- and 20-amp receptacles in dwelling units must be tamper-resistant, with internal shutters that keep a child from pushing an object into a single slot. Exceptions exist for receptacles mounted more than five and a half feet above the floor, receptacles that are part of a light fixture or appliance, and dedicated receptacles behind appliances that don’t move easily. The inspector looks for the “TR” marking on the face of standard outlets.
Grounding and Bonding
Grounding gives stray current a safe path to earth instead of through a person. The inspector traces the grounding electrode conductor from the service panel’s neutral bar to the grounding electrode, typically a ground rod or the metal water pipe. Inside the main panel, a bonding jumper must connect the neutral bus to the enclosure, usually identified by a green screw or strap. On the load side of the service, such as at a subpanel, neutral and ground must stay separated. Improper bonding is one of the more dangerous defects, because it can energize metal parts of the building without tripping a breaker.
Breaker Sizing and Panel Condition
Each breaker must match the wire it protects. Standard pairings are 15 amps on 14-gauge copper and 20 amps on 12-gauge copper. A 20-amp breaker on 14-gauge wire is a fire hazard, because the breaker will not trip before the wire overheats. The inspector also looks for double-tapped breakers, where two wires land on a terminal designed for one, and for overcrowded wiring inside the panel. The dead front must be in place so no live components are exposed when the door is opened.
Working Clearance
The NEC requires clear working space in front of every electrical panel: at least 30 inches wide (or the panel’s width, whichever is greater), 36 inches deep for residential voltages, and six and a half feet high. Nothing can be stored in that space. A water heater, shelving, or a stack of boxes in front of the panel is a violation. Junction boxes elsewhere in the building must also remain accessible without removing any part of the structure. Bury a junction box behind finished drywall with no access panel and the inspector will flag it.
Smoke and Carbon Monoxide Alarms
In new construction, smoke alarms must be hardwired and interconnected so that when one triggers, all of them sound.3NFPA. Installing and Maintaining Smoke Alarms Alarms belong inside every bedroom, outside each sleeping area, and on every level of the home including basements. Carbon monoxide detectors follow a similar placement pattern in most jurisdictions. The inspector confirms the wiring, tests interconnection by triggering one unit and listening for the others, and checks the battery backup. Mixing alarms from different manufacturers can defeat interconnection, so all units should come from the same brand.
The Failures That Trip Up Most Projects
A handful of violations account for the majority of failed finals. Working through them before you call in the inspection is the cheapest quality check you can run.
- Missing GFCI or AFCI protection where the code requires it. A bathroom outlet on a standard breaker, or a bedroom circuit without AFCI, fails on the spot.
- Reversed polarity at an outlet, with hot and neutral on the wrong terminals. A basic circuit tester finds it in seconds.
- Double-tapped breakers, causing loose connections, arcing, and overheating.
- Missing or cracked cover plates. Every box needs one.
- Unlabeled or mislabeled panels. If the inspector can’t tell what a breaker controls, the project fails.
- Open grounds, meaning a grounding conductor that is disconnected or was never landed.
- Improper box fill, with too many conductors crammed into a junction box for the volume the code allows.
- Loose devices that shift when you plug something in or flip the switch, signaling poor connections behind the plate.
Most of these are an afternoon of work. The real cost is the scheduling delay for a re-inspection, which can push a project back days or weeks depending on the department’s backlog.
Scheduling the Visit and the Day Itself
Inspection requests go through the local building department, usually through an online portal or an automated phone system, and you’ll need the permit number and job address. Most departments give a window rather than a fixed appointment, and that window can span several hours or a full business day. Plan for someone to be at the property the entire time.
An adult has to be present to let the inspector reach every part of the system. Locked rooms, blocked attic hatches, and inaccessible crawl spaces result in an incomplete inspection. If you pulled the permit as a homeowner, you can be the one there. If a contractor pulled it, the contractor or a representative should be on site to answer questions and address anything the inspector flags in real time.
Pass, Fail, and Temporary Occupancy
A passed inspection produces a green tag or its digital equivalent, posted at the service panel or meter. The department can then close the permit and update the property record. On new construction, the electrical sign-off is one of several approvals required before the jurisdiction issues a certificate of occupancy, which is the legal authorization to move in. On a renovation, the closed permit joins the property’s permanent record, and that record matters when you sell.
A failed inspection produces a correction notice listing every violation. You fix each item and request a re-inspection. Re-inspection fees typically apply, generally somewhere in the range of $50 to $150 per return visit, and you should budget at least a few days for scheduling. If you believe the inspector misread the code, most building departments have a formal appeals process, though the delay rarely favors the homeowner.
Some jurisdictions issue a temporary certificate of occupancy when a building is safe to occupy but minor items remain. A temporary electrical sign-off can support this, letting you move in while you finish punch-list work. Temporary certificates typically expire after 90 days and must be renewed if the outstanding items aren’t done. Not every department offers this option, and it’s never a substitute for finishing the work.
What Skipping the Inspection Actually Costs
The inspection itself is a minor inconvenience. Avoiding it compounds over years into costs that dwarf the permit fee.
If unpermitted electrical work causes a fire or other damage, a homeowner’s insurer can deny the claim on the grounds that failing to have the work inspected was negligent. You pay for the damage yourself. Even when the damage isn’t caused by the wiring, an insurer that discovers unpermitted work may raise premiums or cancel the policy. Homeowners often learn this at claim time, which is the worst possible moment.
Resale is the next pressure point. Most states require you to disclose known unpermitted work to buyers, including work done by prior owners. Undisclosed unpermitted work discovered after closing can produce lawsuits. Even properly disclosed, the work reduces market value because buyers price in the cost and uncertainty of bringing it up to code. Lenders may refuse to approve a mortgage on a property with known unpermitted work, cutting your buyer pool down to cash purchasers and investors who will demand a steep discount.
Building departments that discover unpermitted work can issue civil fines running into the thousands of dollars, and some codes treat each day of violation as a separate offense. The department can also issue a stop-work order, require you to open finished walls so the wiring can be examined, or demand that noncompliant work be torn out and redone. Retroactive permitting is available in many jurisdictions, but it costs more and disrupts more than doing it right the first time.
And if faulty work injures someone, the person who bypassed the inspection can be held personally liable for medical costs and other damages. The inspection is the one independent safety check between the installation and the people who live with it.