What work requires a licensed tradesperson in Ontario?

In Ontario, several types of construction work legally require licensed tradespeople to perform the work safely and to code. This isn't just about quality - it's about legal compliance, insurance coverage, and protecting your family's safety.

Electrical Work - ESA Licensed Electrical Contractor Required

All electrical work in Ontario falls under the Electrical Safety Authority (ESA) and requires a Licensed Electrical Contractor (LEC). This includes installing new outlets, upgrading panels, adding circuits, or any wiring changes. Even simple tasks like installing a ceiling fan with new wiring need an LEC if you're pulling permits.

Homeowners can do their own electrical work, but it still requires ESA permits and inspections. Most insurance companies prefer licensed contractor work. You can verify any electrical contractor's license at esasafe.com/contractor-locator before hiring.

Gas Work - TSSA Certification Required

Any work involving natural gas, propane, or oil systems requires a TSSA-certified technician with proper G1 or G2 certification. This covers furnace installation, gas line work, fireplace connections, BBQ hookups, and appliance installations.

For Ottawa homeowners, this is especially important when converting from oil to gas heating - a popular upgrade that requires both TSSA certification and City of Ottawa permits. Verify technician credentials at tssa.org before any gas work begins.

HVAC Systems - Licensed Technicians

Installing or significantly modifying heating, ventilation, and air conditioning systems requires licensed HVAC technicians. In Ottawa's climate, proper installation is crucial for efficiency and safety. This includes heat pumps, central air, ductwork modifications, and ventilation systems.

Plumbing - Licensed Plumber for Major Work

While homeowners can handle minor repairs, major plumbing work requires a licensed plumber. This includes moving plumbing lines, installing new fixtures that require permit work, backflow prevention devices, and any work requiring City of Ottawa plumbing permits.

What About Other Trades?

General contractors don't require specific provincial licensing in Ontario, but they need proper WSIB coverage and insurance. However, any specialized trade work they subcontract (electrical, gas, plumbing) must use properly licensed tradespeople.

For roofing, flooring, drywall, painting, and general carpentry, Ontario doesn't require specific trade licenses, but contractors still need proper insurance and WSIB clearance.

Permit Requirements in Ottawa

Even with licensed tradespeople, most of this work requires permits from the City of Ottawa. Call 613-580-2424 or check ottawa.ca/building to confirm permit requirements for your specific project. Licensed tradespeople can usually pull the necessary permits, but always verify this is included in your contract.

Protecting Yourself

Always verify licenses through official channels - ESA for electrical, TSSA for gas work. Check WSIB clearance certificates at wsib.ca/clearances. Never hire someone who says they can "skip the permits" or work without proper licensing. Your insurance may not cover damage from unlicensed work, and you could face safety issues or problems when selling your home.

The key is understanding that in Ontario, safety-critical trades require proper licensing and permits - and there are no shortcuts that won't cost you more in the long run.