Who regulates gas heating contractors in Ontario?

The Technical Standards and Safety Authority (TSSA) handles fuels, including natural gas, propane and fuel oil, along with boilers and pressure vessels. Electrical contractor licensing sits with the Electrical Safety Authority. Check both sites for what applies to you.

Can I advertise electrical work with my heating services?

Be careful. ESA notes that only licensed electrical contractors may bid on or advertise electrical work for others in Ontario. If you aren't licensed for it, leave it out of your ads and website.

Is the GTA too competitive for a new company?

Paid search there is expensive and the map results are crowded, but the market is huge. New companies tend to do well by owning a few neighbouring communities rather than the whole region.

Starting a Heating Company in Ontario

Ontario is where the most heating work in Canada happens and where the most companies compete for it. A new heating company in Toronto, Ottawa or Hamilton enters search results that already hold dozens of established names, many with years of reviews. You can still win, but not by sounding like everyone else or by trying to cover the whole Greater Toronto Area from one van.

We help new owners with the brand and the launch marketing. Registration and licensing are between you and the Ontario bodies linked below. For the wider agency view of the Ontario market, the group's Ontario-focused brand is HVAC.Digital.

Ontario's heating market for a newcomer

Gas leads, with a meaningful electric and propane share. According to Statistics Canada, in 2023, 58% of Ontario households used natural gas for primary heating, 18% electricity and 4% propane. Propane matters more than the percentage suggests in rural and cottage areas, where it can define a whole service niche.

The biggest population centres are Toronto, Ottawa, Mississauga, Brampton, Hamilton, London, Markham and Vaughan. Positions that make sense for a new company:

Neighbourhood-scale city company: for example, a handful of east-end Toronto neighbourhoods, or the west side of Ottawa.
Suburban or small-city anchor: one regional municipality where you can arrive fast.
Rural propane and oil specialist: serving homes beyond the gas mains.
Heat pump upgrade company: built around the rebate program below, if you're licensed and trained for it.

Climate and seasonality

Southern Ontario's winters are cold but moderated near the Great Lakes; northern Ontario's are longer and colder. In the south, autumn tune-ups and the first cold weeks drive repair demand, while spring and summer bring cooling and upgrade enquiries. In the north, the heating rush is longer and the emergencies are more serious.

Launch planning tip: in a crowded southern market, a new company often gets its first foothold in spring and summer, when bigger competitors focus on air conditioning and homeowners have time to plan heating upgrades.

Authorities to look up before you open

Confirm your obligations directly with each:

TSSA: fuels (gas, propane, fuel oil), boilers and pressure vessels. See its contractor registration and certification page.
Electrical Safety Authority: electrical contractor licensing.
Skilled Trades Ontario: trade certification and apprenticeship.
WSIB: workplace insurance.
Ontario Business Registry: name registration and incorporation.
Consumer Protection Ontario: consumer protection rules.
HCRA: licenses new-home builders and vendors, relevant only if your company plans to build or sell new homes.

Programs your customers will ask about

As of October 2026, the Home Renovation Savings Program, run by Save on Energy and Enbridge Gas with provincial support, offers rebates on upgrades including cold-climate air source and ground source heat pumps and smart thermostats. The income-based Energy Affordability Program offers free upgrades to eligible households, including an oil-to-heat-pump stream described as available for a limited time.

These programs shape how Ontario homeowners shop. A new company can earn trust with a clear, dated page that explains which programs exist, links to them, and says how you'll help customers check eligibility. Don't print rebate amounts on trucks or flyers; they outlast the program terms.

How we'd launch a new heating company in Ontario

Pick a small, profitable area. In the GTA, three to five neighbouring communities is plenty for year one.
Choose a distinctive name. In crowded markets, generic names vanish. See naming and brand and the naming guide.
Build a fast, specific launch site that names your communities. See launch website.
Verify your Google profile early and collect reviews from day one.
Run tightly targeted paid search with strict caps, since cost per click in large Ontario cities can be high.

See the areas overview for the other provinces, or read about results from our HVAC work, including Roma Heating & Cooling, which saw 400% organic traffic growth in 12 months.

Starting a heating company in Ontario