Who regulates what in Ontario
In Ontario, the Electrical Safety Authority (ESA) administers permits and inspections for electrical work under the Ontario Electrical Code. Most electrical permits are pulled by the Licensed Electrical Contractor (LEC) doing the work, though homeowners can pull their own permit for work on their own single-family home in many cases — with the understanding that the work still needs to pass ESA inspection.
Work that typically does NOT require a permit
- Like-for-like replacement of a receptacle, switch, or light fixture on existing wiring
- Replacing a circuit breaker with the same type and rating
- Installing a plug-in appliance (no new wiring involved)
- Cosmetic work — cover plates, light bulbs, lamp cords
Work that typically DOES require a permit
- Adding a new circuit or new wiring of any kind (new outlet, new lighting run, new switch loop)
- Installing or upgrading an electrical panel or service
- Installing an EV charger, hot tub, or other dedicated high-draw circuit
- Basement, kitchen, or bathroom renovations involving any wiring changes
- Installing or altering interconnected smoke/CO alarm wiring
- Any generator or transfer switch installation
- Solar PV or battery backup system installation
Not sure if your project qualifies?
When in doubt, a quick call to the ESA or a licensed electrician before you start can save you from redoing work later.
The permit process, in short
- Apply for a permit with the ESA before work begins — either yourself (owner-pulled) or through your LEC.
- Complete the work to Ontario Electrical Code standards.
- Book an inspection. An ESA inspector reviews the work, sometimes with wiring left exposed for review before it's closed up.
- Receive your Certificate of Inspection once it passes — keep this for your records and for resale.
Why skipping a permit is a bigger risk than it looks
- Home insurance: unpermitted electrical work can be grounds for a denied claim after a fire or electrical incident, even years later
- Resale: home inspectors and buyers' lawyers routinely flag unpermitted electrical work, which can delay or derail a sale
- Safety: the inspection step exists specifically to catch mistakes before they're hidden behind drywall
Red flags: stop and call a licensed electrician
⚠️ Stop the project if you encounter any of these
Aluminum branch wiring · scorch marks, melted insulation, or a burning smell · a warm or buzzing panel · double-tapped breakers (two wires under one breaker terminal) · missing or damaged ground wiring · knob-and-tube wiring · any wiring you can't positively identify. These are all situations where the cost of getting it wrong outweighs any savings from doing it yourself.
Beyond safety red flags, this is also simply the philosophy behind this whole site: electricity sees no color — it treats every mistake the same, regardless of experience level. When there's real doubt, respect electricity and call a pro.