There is no single "general contractor licence" in Ontario — and that surprises most people starting out. To operate legally as a renovation contractor in 2026 you instead assemble a stack of registrations: a registered business or incorporation ($60–$360 to register a sole proprietorship or business name, $300+ to incorporate), an HST number once you exceed $30,000 in revenue, WSIB coverage (mandatory for most construction work, with rates commonly running 5–10% of insurable earnings), general liability insurance of at least $2 million (roughly $1,200–$3,500 per year for a small contractor), ...
Ontario does not issue a general contractor licence, and no provincial body certifies renovation contractors as a category. That means anyone can legally call themselves a renovation contractor tomorrow — which is precisely why homeowners are told to verify insurance, WSIB, and references rather than ask for a licence number. What the province does regulate is the work itself. If you touch permanent electrical wiring, you must be an ESA-licensed electrical contractor. If you work on gas appliances or lines, you need TSSA certification. If you practise one of Ontario's compulsory trades — including plumber, electrician, refrigeration and air conditioning mechanic, sheet metal worker, and several others — you must hold a valid Certificate of Qualification from Skilled Trades Ontario or be a registered apprentice working under supervision. If you build or sell new homes, HCRA licensing is mandatory. Everything else — general renovation, framing, drywall, tiling, painting, decks, landscaping — is unlicensed at the provincial level, though still bound by the Building Code, permits, and consumer protection law.
Some Ontario municipalities require their own trade or business licences. In Ottawa, contractors generally need to confirm business licensing requirements with the City and may need specific licences for activities like drain-laying or sign installation.
Start with the legal entity. A sole proprietorship or registered business name in Ontario costs about $60 online for a five-year registration, while incorporating provincially costs roughly $300 plus optional name-search and legal fees, typically totalling $500–$1,500 with a lawyer or service provider. Incorporation is worth considering once you carry employees, subcontractors, or significant project liability, because it separates personal assets from business risk. Register for an HST number with the CRA — mandatory once your revenue exceeds $30,000 in four consecutive calendar quarters, and often worth doing voluntarily from day one so you can claim input tax credits on tools and materials. Open a dedicated business bank account and set up bookkeeping before your first invoice, not after your first tax season. Finally, decide how you will handle contracts: Ontario's consumer protection rules require written agreements for most home renovation work above threshold amounts, with clear scope, price, and cancellation terms. Getting this paperwork foundation right is the cheapest insurance you will ever buy.
Insurance is the practical gatekeeper of the Ontario contracting industry — most homeowners, general contractors, and every commercial client will demand proof before you set foot on site. Commercial general liability of $2 million is the standard minimum, costing a small contractor roughly $1,200–$3,500 per year depending on trade and revenue; $5 million is increasingly requested on larger jobs. Add tools and equipment coverage, and commercial auto for your work vehicle, since personal auto policies exclude business use. WSIB registration is mandatory for virtually all construction businesses in Ontario, including independent operators, with limited exemptions for certain sole proprietors in home renovation working directly for the homeowner. Premium rates in construction classifications commonly land in the 5–10% of insurable earnings range and vary considerably by trade. If you plan to bid municipal or institutional work, you will also need surety bonding — bid, performance, and labour and material payment bonds — which requires a financial review by a surety provider. Budget these costs into your hourly rate from the start rather than discovering them mid-year.
Clients and general contractors will ask for a WSIB clearance certificate before releasing payment. Keeping your account in good standing is not optional if you want to work as a subcontractor on larger Ontario projects.
If your work falls into a compulsory trade, certification is the law, not a credential upgrade. The path runs through Skilled Trades Ontario: register as an apprentice with a sponsoring employer, complete the required on-the-job hours (commonly 6,000–9,000 hours depending on the trade) plus in-school training blocks, then pass the Certificate of Qualification exam. Exam and membership fees are modest — generally in the $150 range for the exam plus an annual membership fee — but the multi-year apprenticeship is the real investment. Electricians must additionally work under an ESA-licensed electrical contractor, and to run your own electrical business you need an ECRA/ESA contractor licence with a designated Master Electrician on staff. Gas technicians certify through the TSSA at G3, G2, and G1 levels. Plumbers hold a 306A Certificate of Qualification and must comply with municipal plumbing permit requirements. If you are a general contractor who does not hold these certifications, the answer is simple: subcontract the regulated work to properly licensed trades and keep copies of their credentials on file.
Building or selling new homes in Ontario is a separate regulatory world. The Home Construction Regulatory Authority licenses all new home builders and vendors, and operating without a licence carries substantial penalties. Licensing requires demonstrating technical competence through required courses, showing financial capacity, passing a conduct and background review, and enrolling every home you build with Tarion, Ontario's new home warranty administrator. Fees vary with the size and type of your operation but commonly run in the low thousands annually for a small builder, plus per-home Tarion enrolment fees. Importantly, HCRA licensing applies to new homes, not renovations — a contractor doing kitchen and basement work does not need it. But the line can blur: substantially rebuilding a home or constructing a new secondary dwelling unit for sale may bring you into scope. If your business plan includes any new construction for sale, confirm your status with the HCRA before you start, because retroactive compliance is far more expensive than getting licensed first.
Once the paperwork is in place, the challenge becomes winning work. In Ottawa's renovation market, credibility is built on things homeowners can verify: your WSIB clearance, your certificate of insurance, a portfolio of completed local projects, and reviews that speak to communication and cleanliness as much as craftsmanship. Learn the City of Ottawa permit process thoroughly — a contractor who handles permits competently is immediately more valuable than one who pushes that burden onto the client. Price your work using real overhead numbers, including insurance, WSIB, vehicle, tools, and unbillable admin time; underpricing is the single most common reason new Ontario contracting businesses fail in their first three years. Written contracts with defined scope, payment milestones, and change-order procedures protect both sides and signal professionalism. Listing your business in a screened local directory helps homeowners find and vet you — you can join our /directory to get in front of Ottawa homeowners actively requesting quotes for the work you do.
There is no general contractor licence in Ontario. General renovation work is not provincially licensed, but you must register a business, carry liability insurance and WSIB coverage, and comply with the Building Code and permits. Specific activities — electrical, gas, plumbing, and new home building — do require licences through the ESA, TSSA, Skilled Trades Ontario, and the HCRA respectively.
Expect roughly $60 to register a business name or $500–$1,500 to incorporate, $1,200–$3,500 per year for $2 million liability insurance, plus WSIB premiums commonly running 5–10% of insurable earnings. Tools, a work vehicle, and commercial auto insurance are additional.
Ontario's compulsory trades include electrician, plumber, refrigeration and air conditioning mechanic, sheet metal worker, and several others. Practising a compulsory trade requires a valid Certificate of Qualification from Skilled Trades Ontario or registration as an apprentice working under supervision.
In most cases yes. WSIB registration is mandatory for virtually all construction businesses, including independent operators, with limited exemptions for certain sole proprietors working directly for a homeowner in home renovation. Clients and general contractors will typically require a clearance certificate before paying you.
No. HCRA licensing applies to building and selling new homes, not to renovation work. However, substantially rebuilding a home or constructing a new dwelling unit for sale can bring you into scope, so confirm your status with the HCRA before starting that type of project.
Most compulsory-trade apprenticeships take three to five years, combining roughly 6,000–9,000 hours of on-the-job training with in-school sessions, followed by the Certificate of Qualification exam. Exam and membership fees are modest compared with the time investment.