Gas fitting covers any work on the natural gas or propane lines that feed your furnace, water heater, stove, dryer, BBQ hookup, fireplace, or outdoor heater. It's tightly regulated in Ontario for good reason: a bad connection or an unvented appliance can leak carbon monoxide or cause a fire. We've listed 13 gas fitting businesses serving Toronto, ranging from full-service plumbing companies with gas divisions to specialists who only do hookups and appliance conversions.
Before you hire anyone, confirm two things: that the individual doing the work holds a valid TSSA (Technical Standards and Safety Authority) gas technician license, and that the company pulls a permit when the job requires one (new lines, appliance swaps, and most repairs do). Ask whether they'll handle the TSSA inspection and give you the paperwork afterward. A fitter who brushes off permits or licensing questions is a red flag, regardless of price.
Our scores weigh licensing and credential signals, how a company responds to and resolves complaints, review consistency over time, and general business transparency (clear contact info, real address, straightforward pricing). It's not just a star average. If you want the short list of top-rated plumbing companies across all categories in the city, including several that do gas work, check the ranked guide to Toronto's best plumbers. For a full breakdown of how we calculate scores, see our methodology page.
