Doing Your Own Electrical Work in Ontario: Who Is Allowed, and When ESA Must Know

Five claims about DIY wiring, each checked against the regulation and ESA’s own published guidance. One holds in part, three do not, and one claims a condition the regulation never wrote.

I’m Arthur Zhao, a real estate broker in Ontario. Picture a listing with a line like “basement wiring updated by owner.” A buyer reading that wants answers to two questions. Was the owner allowed to do that work? And does the Electrical Safety Authority have any record of it?

The answers come from three sources, and they say different things. The licensing regulation, O. Reg. 570/05, says who needs a licence. The Electrical Safety Code, adopted through O. Reg. 164/99, says how the work has to be done. ESA’s own published guidance says when it must be told. Below I take five claims about DIY electrical work and check each one against the actual wording. The verdict for each is one of four: holds, partly holds, does not hold, or the text doesn’t say.

Claim 1: “Homeowners are exempt from the electrical rules.”

Verdict: partly holds.

The exemption is real, but it is narrower than this claim makes it sound. Section 2 of O. Reg. 570/05 opens: “This Regulation does not apply to a person engaged in the following types of electrical work.” Paragraph 3 of that list is “Work done on electrical equipment or electrical installations within a residential dwelling if done by an owner or occupant of the dwelling.”

What that paragraph switches off is this one regulation, which is about licensing. Its core rule is section 3: “No person shall operate an electrical contracting business without an electrical contractor licence.” So an owner working on their own home does not need a contractor licence.

That is where the exemption ends. It does not reach the Electrical Safety Code. O. Reg. 164/99 adopts the CSA Canadian Electrical Code Part 1, C22.1:24, together with ESA’s Ontario Amendments dated June 12, 2024, as the Electrical Safety Code (s. 1). Section 2 then says every act or omission connected with the generation, transmission, distribution, retail or use of electricity in Ontario “must be done or made in compliance with the Electrical Safety Code.” That sentence makes no exception for owners. ESA’s DIY page also says the Code is updated every three years and that the current edition took effect on May 1, 2025.

To sum up: you are exempt from the licence requirement. You are not exempt from the Code, and you are not exempt from telling ESA (see Claim 3).

Claim 2: “It’s my house, so anyone I trust can do the work: a handy friend, my renovation contractor, an electrician I know.”

Verdict: does not hold.

Start with the exemption itself. Paragraph 3 names only two kinds of people: an owner or occupant of the dwelling. A friend, a relative or a neighbour is neither of these, so the exemption does not cover them. Being present while they work does not change that, because the paragraph says nothing about supervision.

ESA’s DIY page puts it more bluntly: “Only you can do electrical work in your home, but you must file a notification with ESA,” and “Friends, family members or neighbours cannot perform electrical work in your home.”

One honest caveat. Section 3 is worded around operating an electrical contracting business, which the regulation defines as “a business that is engaged in the carrying out of electrical work.” The text I read does not address an unpaid favour directly. ESA’s published position, though, makes no exception for one.

For people you hire, ESA’s guidance is explicit:

• Its Permit Education page says that “by law, only an LEC can be hired to do electrical work on a home in Ontario.” LEC stands for Licensed Electrical Contractor.
• Its page for real estate agents says “General contractors and handypersons are NOT qualified or permitted by law to be hired to do electrical.”
• The same page says “Master Electricians” and “Certified Electricians” “can’t be hired directly to do electrical work unless they are registered as an LEC themselves.”

So an electrician’s personal trade credential is not the test. The question is whether the business you hire holds an electrical contractor licence.

Claim 3: “Small jobs don’t need ESA.”

Verdict: does not hold, on ESA’s own wording.

ESA’s DIY page is direct: “Even for little jobs, you must file a notification of work (i.e., permit) with ESA before commencing work.” The obligation comes before the work starts, not after.

Two points of precision. First, ESA’s two pages word this slightly differently. The page for real estate agents says “Most electrical work done by homeowners themselves requires an ESA notification of work to be filed before the work starts.” Neither page lists which jobs, if any, fall outside that rule, and I have not read the Code provision that sets the notification requirement. So I am not going to tell you a particular job is too small to file. If you think yours might be, ask ESA before you begin, not afterwards.

Second, the licensing regulation does have a carve-out that sounds like a small-jobs rule but is not one. Section 2, paragraph 8, covers maintenance, service or repair of equipment that plugs into an electrical source, as long as it does not include installing, extending, altering or repairing any wiring connected to it. That is an exemption from licensing, for plug-in equipment. It says nothing about ESA notification, and it does not cover your home’s wiring.

On cost, ESA says the notification fees “may vary based on the complexity of the job, but for many small residential projects can be less than $100.” That is ESA’s own wording, not a fee schedule.

Claim 4: “Once it works, the job is done.”

Verdict: does not hold.

Whether the light comes on is not the test ESA uses. ESA’s DIY page sets out what happens after the work:

• “You must get your work reviewed by ESA as soon as it is complete.”
• “Complicated installations may need an inspection at several stages.”
• The work must not be concealed before ESA has reviewed it. Closing up a wall or ceiling first defeats the review.
• Once the work is reviewed and approved, ESA issues a Certificate of Acceptance, which ESA calls “an important document for insurance purposes and resale.”

The paperwork also outlasts the job. According to ESA (2026), once a notification is filed it “creates a permanent record of the electrical work that has been done.” A notification that is filed but never closed stays on that record, and this is where a sale comes into it (see the section on buying and selling below).

One more line from Claim 1 applies here. O. Reg. 164/99, s. 2 requires every act or omission connected with the use of electricity to comply with the Code. Working is not the same as compliant.

Claim 5: “The DIY exemption is only for owners who live in the house.”

Verdict: the text doesn’t say that.

Paragraph 3 says “an owner or occupant of the dwelling.” It adds no condition that the owner live there, that the home be a single-family house, or that it not be rented. I am not going to add a condition the regulation does not contain, and you should be wary of anyone who does.

What the sources do say:

• Tenants: ESA’s DIY page says “If you’re a tenant, you are allowed to do electrical work inside your rental but check with your property manager first.”
• Landlords working inside a unit that is already rented: neither the regulation nor the ESA pages I read deal with this case specifically. I am not going to fill that gap with a guess in either direction.

If you own a rental and plan to do the work yourself in an occupied unit, put the question to ESA before you start.

The five claims at a glance

Where this matters when a house changes hands

Back to the listing that says “wiring updated by owner.” ESA’s page for real estate agents suggests that buyers request a Search of Records from ESA before the deal is final. ESA says the search will show any open notifications on the property since 2000.

The reason, in ESA’s words, is that “An open notification automatically transfers responsibility to the new homeowner to remedy any electrical defects that may exist.” That is ESA’s statement. Whether, and how, that responsibility plays out in a particular dispute is not something the pages I read resolve.

ESA also suggests considering a closing condition that the sale depends on ESA confirming that notifications for recent renovations were taken out and closed. If you want language like that in an agreement, have your lawyer or your own agent draft it for your deal. I am describing what ESA suggests, not drafting a clause for you.

ESA frames this homework as applying to homes being bought or sold, so a seller can run the same check before listing and see what a buyer’s search would turn up.