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Trade Playbook

Fuel Systems & Gas Fitting

Compulsory trade, certification required

Gas work in Ontario is regulated by the TSSA, not Skilled Trades Ontario. You need a gas technician/fitter certificate (G3, G2, or G1) scaled to the size of appliance you work on, plus a registered contractor.

Fuel Systems & Gas Fitting at a glance

Licence to do the work
Required — TSSA gas technician certificate (G3 → G2 → G1)
Path in
College gas technician program + TSSA exams — months, not years, to G3
Regulated by
TSSA
Insurance baseline
Strong CGL — confirm gas work is not excluded

Where are you right now?

Learn it. Earn it. Own it. Pick the door that matches where you are.

Getting inBecome a gas fitterHow people actually enter this trade: sponsors, registration, hours, and school.Open Going out on your ownStart a gas fitting businessThe step-by-step from qualified tradesperson to incorporated, insured, bid-ready owner.Open Just lookingCommon questionsLicences, costs, timelines: the questions everyone asks, answered straight.Open

The licensing layer, explained

Fuel and gas work is governed by the TSSA under the Technical Standards and Safety Act. Gas fitters hold a G3 (limited residential), G2 (residential and light commercial), or G1 (unlimited) certificate. Businesses must operate as a registered gas contractor with TSSA, and oil, propane, and other fuels have their own certifications.

Certifications in this trade

  • G1/G2/G3Gas Technician (TSSA)

Insurance to expect

Gas carries fire, explosion, and carbon-monoxide exposure — among the highest-consequence residential trades. Carry strong CGL limits and confirm gas work is not excluded from your policy.

Go to the source

The official pages that govern this trade. Bookmark these, they are the final word on requirements and fees.

Keep reading

IncorporationCRA RegistrationWSIB & ProvincialTrade LicensingInsuranceSafety ComplianceOperational SetupBid Readiness

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