Electrical work is where the permit question has the clearest answer and the highest stakes. Mistakes in wiring are invisible, can sit quietly for years, and then start a fire. That's why most towns require permits for new circuits and panel work, and many require that the work be done by a licensed electrician.
This guide helps you sort small fixes from permit-triggering work, and covers what to decide, measure and ask. It's general guidance, not electrical advice. Check with your local permit office, and use a licensed electrician for anything beyond simple like-for-like replacements.
What usually needs a permit
Towns differ, but these are commonly permit territory:
- New circuits of any kind, including dedicated circuits for appliances.
- Panel replacement or upgrade, and service changes with the utility.
- EV chargers, especially hardwired chargers and new 240-volt circuits.
- Standby generators and transfer switches.
- Extending circuits into new space, like a finished basement or an addition.
- Outdoor wiring, including circuits to sheds, pools, hot tubs and landscape lighting on line voltage.
- Rewiring an old house, or replacing outdated wiring types.
What often doesn't
Many towns treat like-for-like replacements as maintenance: swapping a light fixture, replacing a worn outlet or switch with the same type in the same box, or changing a ceiling fan on a box rated for it. "Often" is doing a lot of work in that sentence. Some towns require a permit even for those, and safety rules for outlets near water or outdoors can change what a "replacement" has to be.
Who is allowed to do the work
This is the question to answer first, because it decides everything else. Some states and towns let homeowners do electrical work on their own home, with a permit and inspection. Others require a licensed electrician for nearly everything. Even where homeowner work is allowed, utility-side work on the service is usually off-limits. Ask your office directly.
What to decide first
- Scope. Write down exactly what you're adding or changing.
- Load. For big additions like an EV charger, heat pump or electric range, you or your electrician need to know whether the panel and service have capacity. A load calculation answers that.
- Location. Indoors, outdoors, wet or damp locations, garages and bathrooms all have specific protection requirements.
- Charger or generator model. Have the product's installation manual handy. Inspectors often check against it.
What to note at the panel
You don't need to open the panel. From the outside you can note:
- The main breaker rating printed on the main breaker.
- How many open spaces there are for new breakers.
- The panel's brand and approximate age (sometimes on a label inside the door).
- Whether there are any scorch marks, buzzing, warm breakers or a burning smell. If so, stop and call an electrician now.
Questions to ask your permit office
- Does this work need an electrical permit?
- Can I do this work as the homeowner, or does it require a licensed electrician?
- Which inspections are required: rough-in before walls close, and final?
- Does the utility need to be involved, for example for a service upgrade or a generator?
- Do you need a load calculation, a panel schedule, or product manuals with the application?
- For an EV charger: any local rules on location, outdoor installation or disconnects?
Common reasons electrical work fails inspection
- Work covered before rough-in inspection.
- Missing protection devices where required, such as in bathrooms, kitchens, garages and outdoors.
- Overloaded circuits or a panel without capacity for the new load.
- Wrong wire size for the breaker.
- Junction boxes buried in walls without access.
- A device installed in a way that doesn't follow its manufacturer's instructions.
EV chargers, specifically
EV chargers are one of the most common reasons homeowners contact an electrician today. The questions are consistent: Does the panel have capacity for a new 240-volt circuit, or will it need a load-management device or a service upgrade? Where will the charger mount, and how far is it from the panel? Is it indoors in a garage or outside? Hardwired or plug-in? Many towns want a permit for any new circuit for a charger, and some utilities offer programs that require proof of a permitted installation. Have the charger's installation manual ready when you talk to the office.
Working safely
Turn off the breaker and verify the circuit is dead with a tester before touching anything. Know that some boxes have more than one circuit. Never work in the panel itself unless you're qualified. Aluminum branch wiring, knob-and-tube wiring and certain older panels have known issues; if your house has them, talk to an electrician before adding anything.
Keep records
Keep copies of permits, inspection results and your electrician's invoices with your house papers. They matter when you sell, when you file an insurance claim, and when the next person needs to know what's behind the wall.
Do it yourself or hire a pro?
For most electrical work beyond replacing a fixture or device, hire a licensed electrician, and in many places you're required to. Panel work, service changes, generators and EV chargers are pro jobs. Sully's report flags electrical work that typically needs a licensed pro and says so plainly.
How Sully helps with electrical work
Sully asks what you're adding and where, then reads your town's permit pages first, then county and state, labeling every rule with its source. The report tells you whether your town says a permit is required, who may do the work if the town publishes it, which inspections it lists and who to call. For a charger or a circuit to a shed, the materials list covers conduit, wire, boxes and fittings sized from confirmed distances, with a waste allowance, and a clear note on anything an electrician should size. If the town doesn't publish its electrical rules online, the report says so and suggests who to ask.
Related reading: DIY or hire a pro? and 5 questions to ask your town before you start.