Gas Fitting in Ontario
Gas fitting covers any work on a natural gas or propane line: running new gas lines for a stove, dryer, BBQ hookup or outdoor fire feature, connecting furnaces and water heaters, converting appliances between fuel types, and diagnosing leaks or pressure problems. In Ontario, this work legally requires a licensed gas technician (G2 or G3) registered with the Technical Standards and Safety Authority (TSSA), and most jobs need a permit and a final inspection before the line goes live. This is not a category for unlicensed handyman work, a bad connection or an unpermitted install can mean a failed home inspection, an insurance problem, or worse.
Before hiring, check that the company can show its TSSA registration and technician license numbers, ask whether they pull the permit themselves, and get a written scope covering pipe sizing, venting, and who handles the inspection appointment. We've listed 21 gas fitting businesses serving Ontario, and our ranked plumber guide weighs licensing, review consistency, and responsiveness to help you shortlist faster. The full scoring breakdown is on our methodology page if you want to see how we weigh each factor.
Let us match you with gas fitting
No cost, no strings attached. Tell us what you need and we'll connect you with suitable plumbers.
All gas fitting, ranked by score and relevance
40 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.
Enquiries submitted through this site's contact forms may be passed to partner providers who can carry out the work, and the site may receive a referral fee. Rankings and scores are determined only by the site's published method and are not affected by referral fees.
Common questions about gas fitting
- How much does gas line installation cost in Ontario?
- A simple appliance hookup (stove, dryer, BBQ line) often runs a few hundred dollars, while running new line through walls or extending service to a detached structure can run into the thousands once permits, trenching, and inspection fees are added. Get a firm quote after the technician sees the run, not just a phone estimate.
- How often does gas equipment need to be serviced or inspected?
- Furnaces and water heaters are typically serviced annually, and any time you add or move an appliance the new connection needs a permit and inspection before use. Homeowners switching fuel types (oil to gas, for example) also need a full inspection as part of the conversion.
- What should I expect during a gas fitting job?
- Expect the technician to check existing pipe sizing and pressure, confirm venting and clearances meet code, pull a permit where required, and pressure-test the line before connecting appliances. A reputable contractor books the TSSA inspection rather than leaving that step to you.
- How do I judge whether a gas fitting company is any good?
- Ask for their TSSA contractor registration number and the technician's G2/G3 license, confirm they carry liability insurance, and look for a track record of consistent, detailed reviews rather than a handful of glowing ones. A company that's vague about permits or inspections is a red flag.
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.