Licensing for contractors in Ontario
Ontario does not issue a general contractor's licence, which is why the answer to “am I licensed?” is never a single yes or no. What exists instead is licensing attached to particular work: building or selling a new home, and trades like electrical where doing the work for hire without a licence is an offence. Municipalities add their own business licensing on top.
The rules, with sources
Every line below links to the authority it came from and the date we last read it.
| New homes | Every builder and seller of a new home in Ontario must be licensed by the Home Construction Regulatory Authority. Building or selling a new home without a valid licence is illegal. |
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checked 2026-09-08
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| Custom homes on the owner's land | A builder putting up a contract or custom home on land owned by the home's owner must be licensed as both a vendor and a builder. |
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checked 2026-09-08
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| Renovations | Renovations or upgrades to an existing home do not typically make the home new, and so do not require the builder to be licensed by the HCRA. |
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checked 2026-09-08
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| Owner-builders | Someone building their own home may be an owner-builder and may not need a builder licence, provided they do not sell it — but an owner-built home is not eligible for warranty coverage under the Ontario New Home Warranties Plan Act. |
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checked 2026-09-08
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| Electrical work | Only electrical contractors licensed by the Electrical Safety Authority may do electrical work for hire in Ontario. A licensed electrical contractor must give you an ECRA/ESA licence number. |
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checked 2026-09-08
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| The statute behind HCRA licensing | New Home Construction Licensing Act, 2017, S.O. 2017, c. 33, Sched. 1. |
S.O. 2017, c. 33 ↗
checked 2026-09-08
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“General contractor” is not a licensed title here
Ontario has no province-wide licence that makes someone a general contractor. That surprises people moving from provinces that do license the trade, and it is why the useful question is never “do I need a licence” in the abstract — it is which of these three things your next job touches: is it a new home, does it involve a trade that is licensed on its own, and does the municipality license contractors doing business there.
The absence of a general licence is not the absence of obligations. WSIB coverage, the Building Code, permits, and municipal business licensing all apply regardless, and none of them are waived because nobody handed you a contractor's licence.
The new-home line is where people get caught
The HCRA licence attaches to new homes, and the boundary is whether the work makes the home new rather than how large the job is. A deep renovation of an existing house typically stays on the renovation side. Building a custom home on a client's own land does not — that is a licensed activity, as both vendor and builder, even though you never own the land.
The owner-builder route exists for someone genuinely building for themselves, and it has a real cost attached: the home does not get warranty coverage under the Ontario New Home Warranties Plan Act. It is not a way to build a house for sale without a licence.
Some trades are licensed whatever you are called
Electrical work for hire is the clearest case: only an ESA-licensed electrical contractor may do it, and they have to give you an ECRA/ESA number. A general contractor cannot absorb that work in-house without holding the licence, and hiring an unlicensed electrician does not move the problem onto them.
Keep the licence numbers of the subs you use on file alongside their WSIB clearance. It is the same problem as the T5018 — the information is easy to collect at the start of a relationship and painful to reconstruct when someone asks for it later.
Questions people actually ask
Do you need a licence to be a general contractor in Ontario?
There is no general contractor's licence in Ontario. Licensing attaches to particular work instead: building or selling a new home requires an HCRA licence, and trades such as electrical work require their own. Municipalities may also license contractors doing business locally.
Who has to be licensed by the HCRA?
Every builder and seller of a new home in Ontario. Building or selling a new home without a valid HCRA licence is illegal.
Do renovators need an HCRA licence?
Typically not. Renovations or upgrades to an existing home do not usually make the home new, so they do not require the builder to be licensed.
Do I need a licence to build a custom home on my client's land?
Yes. A builder of a contract or custom home on land owned by the home's owner must be licensed as both a vendor and a builder.
Can I build my own home without a licence?
You may be able to, as an owner-builder, provided you do not sell it. An owner-built home is not eligible for warranty coverage under the Ontario New Home Warranties Plan Act.
Can a general contractor do electrical work in Ontario?
Not for hire, unless they are a licensed electrical contractor. Only ESA-licensed electrical contractors may do electrical work for hire, and they must provide an ECRA/ESA licence number.
GoBuild keeps licence and WSIB numbers on the subcontractor record rather than in someone's phone, and flags the ones that have lapsed before you schedule that sub onto a job.
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This is a plain-English summary written for contractors, not legal or tax advice, and it is not a substitute for reading the source or talking to your accountant or lawyer. Rules change; each line above carries the date we last checked it. If you find something out of date, tell us and we will fix it.