Gas Fitting in Ontario
Gas fitting covers the installation, repair, and inspection of natural gas and propane lines and the appliances that run on them: furnaces, water heaters, ranges, fireplaces, BBQ hookups, and outdoor patio heaters. In Ontario, this work legally has to be done by a licensed gas technician (G1 or G2 certification), not a general plumber or handyman. A G2-licensed tech can handle most residential appliance hookups and line work; a G1 is required for higher-pressure and larger commercial systems. Any new install or major line change also needs a permit and inspection through the TSSA (Technical Standards and Safety Authority), which is a separate step from a municipal plumbing permit.
When you're comparing gas fitters, ask to see their TSSA certificate number before any work starts, since this is non-negotiable for insurance and safety reasons. Beyond licensing, look for a company that pulls permits as a matter of course, explains what inspection will involve, and gives you a written quote that separates labour, materials, and any permit fees. Same-day emergency response matters too if you smell gas or lose heat in winter, so response time is worth checking.
We've scored the 11 gas fitting businesses in this category on licensing, responsiveness, review consistency, and transparency around pricing. See how we weigh those factors on our methodology page, or jump straight to the ranked guide to plumbers to compare providers across all service types, including gas fitting.
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All gas fitting, ranked by score and relevance
22 businesses. The order weighs each business's overall score by how much of its reviewed work is gas fitting, so a lower-scored specialist can rank above a higher-scored generalist. Filter and sort below, or open the full map view.
When you submit a quote or contact form through this site, your enquiry may be shared with partner providers who can do the work. We may receive a referral fee for these matches, but our rankings and scores are determined solely by our published scoring method and are never influenced by referral fees.
Common questions about gas fitting
- How much does gas fitting cost in Ontario?
- Simple jobs like connecting a gas range or BBQ line typically run a few hundred dollars. Installing a new gas line from the meter to a furnace or fireplace, including permit and inspection fees, often lands between $500 and $1,500 depending on distance and wall or floor access. Get a written quote before work starts since pricing varies a lot by job complexity.
- How often does gas equipment need to be checked?
- Furnaces and gas water heaters should get a professional inspection annually, usually at the start of heating season. Gas lines themselves don't need routine servicing but should be inspected any time you smell gas, notice a yellow (rather than blue) flame, or before connecting a new appliance.
- What should I expect during a gas fitting appointment?
- The technician will check your existing line pressure and condition, confirm the appliance's BTU rating matches the supply line, make the connection or repair, then pressure-test the line before leaving. For new installs, expect a follow-up TSSA inspection before the gas is turned on and the job is signed off.
- How do I know if a gas fitter is doing quality work?
- Ask for their TSSA licence number and confirm it's current. A reliable fitter pulls the required permit, tests for leaks with a proper gauge (not just soapy water as the only check), and leaves you with paperwork showing the inspection passed. Avoid anyone offering to skip the permit to save time or money.
Guides to choosing gas fitting
- Gas leak and carbon monoxide warning signs: what to do
How to recognize a gas leak or carbon monoxide risk in your Ontario home, the immediate steps to take, and when to call a gas fitter versus emergency services.
- Gas fitting rules in Ontario: licensing, permits and what homeowners should know
What Ontario homeowners need to know about gas fitting regulation before hiring anyone to touch a gas line, from licensing checks to permits and inspections.