Gas Line Installation Cost Ontario 2026: New Service, Extension, TSSA Permits, and Who Pays What

New Natural Gas Service Connection

This is the job of getting natural gas to a house that doesn't currently have it. Maybe you're building new, maybe you're converting from oil or propane, maybe you just moved into a rural area where the gas main was extended recently. Either way, the work has two sides: Enbridge's side (the utility-owned service line from the street main to the gas meter at your house) and your side (everything past the meter).

Enbridge handles and owns everything from the main under the road up to and including the gas meter that gets bolted to the outside of your house. You pay for the initial connection based on distance and projected consumption, but Enbridge maintains that line forever once it's in the ground.[3] For a typical suburban lot where the main runs down the street in front of the house and the service line is under 20 metres, the job is roughly $1,500 to $2,500. For longer runs on rural properties (long driveways, lot depths of 100 metres or more), the cost climbs into the $3,000 to $4,500 range or higher because you pay per metre past the standard service-connection allowance.

The "connection allowance" is where most of the confusion happens. Enbridge calculates an allowance based on the gas consumption they expect from your house over a given period, then applies that allowance against the actual install cost. If you're committing to a gas furnace, gas water heater, and gas range, the projected consumption is high enough that the allowance often covers the standard service line entirely and your out-of-pocket is zero or near-zero. If you're only connecting a single gas fireplace as a decorative appliance, the allowance is small and you pay most of the cost yourself. Ask Enbridge for a written connection estimate that shows the allowance calculation before you commit to the project.[3]

Existing Home Gas Line Extension

This is the much more common job. You already have gas at the house, the meter is there, and you want to run a new line from the meter to a new appliance. Maybe you're adding a gas range where there was an electric stove, installing a gas dryer next to your laundry, adding a natural gas BBQ hookup on the deck, or dropping a line for a new fireplace or pool heater.

A typical residential line extension is $500 to $2,000 depending on the distance, the number of corners, whether the line is visible or running behind finished walls, and the size of the appliance the line is feeding. A simple short run (10 to 15 feet, exposed in the basement, feeding a dryer or range) is at the low end, around $500 to $800. A longer run through multiple finished rooms, with drywall patching and a larger line size for a high-BTU appliance like a pool heater or generator, can hit $1,500 to $2,000 or more.

The work is always done by a TSSA-licensed G1 or G2 gas fitter. They pull the TSSA permit, run the pipe, pressure test the new section, connect the appliance, and leave you with a copy of the permit and test record for your files. The Ontario Building Code sets the framework for gas piping alongside the CSA B149.1 installation code, and every licensed fitter has to work to both.[4][7]

TSSA G1 and G2 Technician Requirement

Ontario is strict about who can touch a gas line. The Technical Standards and Safety Authority (TSSA) regulates fuels safety in the province and issues certificates of qualification to gas technicians who have completed the required training and passed their trade exams. Every gas technician working in Ontario has to hold a current TSSA certificate, and the certificate class determines what they can legally work on.[1]

A G2 technician can install, inspect, alter, purge, activate, repair, service, or remove any natural gas or propane appliance with an input up to 400,000 BTU per hour, which covers every normal residential appliance. That's your furnace, water heater, gas range, gas dryer, fireplace, BBQ, and most pool heaters. A G1 technician can work on anything, including commercial and industrial installations with larger input ratings. For a single-family house, a G2 is sufficient; there's no reason to pay more for a G1 on a residential job.[1]

When you're hiring, ask for the technician's TSSA certificate number. A legitimate tradesperson will have it on their truck, their invoice, or their business card, and you can verify it through the TSSA registry.[2] If they hedge, won't produce the number, or send "their apprentice" to do the work unsupervised, walk away. An unlicensed install is the number one cause of gas incidents in Ontario homes, and insurance companies will deny any claim tied to work that wasn't done by a TSSA-licensed fitter.

Permit Process

Gas work triggers two permits. The TSSA permit (also called a gas permit or fuels permit) is mandatory for essentially all gas line work and is pulled by the licensed fitter as part of the job. You don't touch this directly; the fitter handles the application, schedules the inspection, and closes the permit out. The fitter's cost to pull the permit is usually bundled into the quoted price, and it typically adds $100 to $250 depending on the scope.

The municipal building permit is separate and depends on what's being installed. A new furnace, a new hot water tank, or a significant mechanical change usually requires a building permit from the municipality, which runs $200 to $500 for a typical residential mechanical permit. A simple appliance swap in the same location with the same line usually doesn't need a municipal permit, only the TSSA one. When in doubt, the fitter can tell you which apply on your specific job, and your municipality's building department will confirm.

Ontario's building permit framework requires separate trade permits for HVAC, electrical, and plumbing when work exceeds a value threshold (typically $5,000 per trade), and gas falls under mechanical.[7] Skipping the permit doesn't save you money in the long run. When you go to sell the house, a buyer's lawyer or home inspector will look for open or missing permits and any unpermitted mechanical work becomes a sale-blocking issue.

Propane Tank Line Install (Off-Grid)

Rural Ontario homes without natural gas service typically run on propane. The install has two parts: the tank and regulator on the outside of the house (the propane supplier's responsibility), and the line work from the tank through the wall and to each appliance (the G1 or G2 fitter's responsibility). Propane is regulated under the same CSA B149 code as natural gas, and the TSSA permit and licensing rules are identical.[4]

Propane suppliers compete hard on tank installs because the fuel supply contract is where they make their money over time. It's very common for a supplier to install a 500 or 1000 gallon tank plus regulator free or for a nominal fee in exchange for a multi-year propane supply agreement. Read the contract before you sign: the tank is often their property, the price per litre may have escalation clauses, and switching suppliers later can trigger tank removal and reinstall charges.

If you're buying your own tank outright (typical for homeowners who want to shop propane suppliers on price every season), a 1000-gallon tank plus regulator and underground line from tank to house runs $2,500 to $4,000 supplied and installed. The in-house line work from the entry point to each appliance is the same $500 to $2,000 per appliance as natural gas.

Gas Meter Upgrade Costs

Most meter upgrades are driven by adding high-BTU appliances: a pool heater (often 250,000 to 400,000 BTU per hour), a standby generator, a gas-fired tankless water heater, a second furnace in an addition, or a commercial range in a renovated kitchen. If the new appliance pushes total demand above what your current meter and service line can deliver, Enbridge has to upsize.

The meter itself is Enbridge's property and they upgrade it free as part of service changes. The service line (street to meter) is also Enbridge's side, and if they need to upsize it the cost is usually absorbed under the utility's rate base with minimal or no bill to you. Where you pay is the house side: new manifolds at the meter, larger-diameter piping from the meter to the first split, possibly a second regulator or pressure-reducing valve, and the pressure test and permit close-out. Budget $500 to $1,500 for house-side changes on a typical upgrade.

If your service line itself needs replacing (it's old, too small, or partially buried in shifting ground), that's a bigger job and it can cost $1,500 to $4,000 depending on length, excavation difficulty, and landscaping repair. Enbridge coordinates the trenching and line swap; the connection reconfiguration is done by your G1 or G2 fitter.

Who Pays What: Homeowner vs Enbridge

This is the single most confused area in gas line pricing, and bad contractors exploit it. Here's the clean split.

Enbridge pays for (or owns): the main under the street, the service line from the main to your house (within the allowance), the gas meter on the outside of your house, and ongoing maintenance of all of that. If a tree roots grow into the service line 20 years from now, they fix it. If the meter fails, they replace it. This is why gas is delivered as a utility: the infrastructure is collective.[3]

You pay for: any portion of the service line install beyond the allowance (long runs, rural properties), all interior piping from the meter to each appliance, all house-side equipment (regulators past the meter, shutoff valves, manifolds), all the labour to pull permits and run line extensions, and ongoing maintenance of interior gas infrastructure. The meter is the dividing line: everything upstream is Enbridge's, everything downstream is yours.

The sales pitch to watch out for is a contractor who tries to charge you for "service line work" when what they actually mean is interior work. Any quote should clearly distinguish between Enbridge's portion (which they quote directly through their service request process, not through a third-party fitter) and the interior work the fitter is doing. If a contractor bundles the two without a breakdown, ask for the line items separately. The Consumer Protection Act in Ontario requires written contracts with clear scopes for direct home sales, and any reputable fitter will provide one without argument.[5]

Related Guides

• Natural Gas vs Propane in Ontario
• Gas Fireplace Cost Ontario 2026
• HVAC Permits Ontario 2026

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