Skip to content
LokalMatch

Gas Line Installation

Gas Line Installation near you

Run or extend gas lines for appliances, BBQs and heaters. Tell us about your gas line project and we’ll help you find local gas fitters who serve your area.

Free for homeowners · No obligation to hire

This type of work often has to be done by a licensed or certified trade. Ask to see licences and proof of insurance before work starts.
On this page

Gas line installation means running new gas piping from your meter, or from an existing line, to an appliance: a range or cooktop, a clothes dryer, a barbecue or outdoor kitchen, a fireplace, a standby generator, a pool or hot tub heater, a garage heater, or a new furnace, boiler or water heater. It also covers extending, resizing or rerouting piping during a renovation and converting appliances when a home switches from propane to natural gas.

In every province this is licensed work. The gas fitter checks whether the meter and existing piping can carry the added load, sizes the new line, routes it safely indoors or underground, installs shut-off valves, tests the system for leaks and arranges any permit and inspection. Homeowners should never cut, extend or connect gas piping themselves, even for a barbecue.

This page covers common gas line projects, who is licensed to do them in Ontario, Quebec and British Columbia, the installation steps, meter capacity, underground lines and locates, and what to do if you smell gas.

Common gas line projects: ranges, dryers, BBQs, fireplaces, generators and pool heaters

  • Gas range or cooktop: a line to the kitchen with an accessible shut-off valve and an approved connector, easiest to run during a kitchen renovation while walls and floors are open.
  • Gas dryer: a short branch to the laundry area; the dryer also needs its own exhaust duct to the outdoors.
  • Barbecue or outdoor kitchen: a line through the wall to an outdoor outlet or a hard connection to a built-in grill; Technical Safety BC notes that a built-in gas barbecue needs a permit, while replacing an existing plug-in style barbecue does not.
  • Fireplace or garage heater: a branch to the unit, coordinated with its venting; the fireplace installation page covers the appliance itself.
  • Standby generator: a larger line to an outdoor unit, sized so the generator and the home's other gas appliances can run together; the electrical transfer equipment is a separate job for an electrician.
  • Pool or hot tub heater: often a long run, sometimes underground, feeding one of the hungriest gas appliances around a house.
  • Propane-to-natural-gas conversion: when gas service arrives, each appliance needs the maker's conversion parts and a qualified technician, and the propane tank is dealt with through its supplier.

Licensed gas fitters and permits: TSSA in Ontario, CMMTQ in Quebec, Technical Safety BC

In Ontario, the TSSA says registered fuels contractors are the only businesses legally authorized to do fuels-related work, and its online registry lets you verify a company's registration before you hire it; the technicians it sends must hold TSSA gas technician certification. In Quebec, the CMMTQ states that all work on a gas installation or a gas appliance must be entrusted to a specialized contractor who is a CMMTQ member, and the owner exceptions it describes for some heating work don't extend to gas.

In British Columbia, Technical Safety BC requires a permit to install or replace gas piping and gas appliances; the licensed contractor you hire applies for it, and at least one inspection must be requested within 180 days of the permit being issued. Elsewhere, the provincial safety authority licenses gas fitters and sets the permit rules. Wherever you live, ask for the licence or registration number and have the quote state who obtains the permit and books the inspection.

How a gas line is installed: load check, pipe sizing, routing, pressure test and inspection

  • Load check: the fitter adds up the demand of every existing and planned gas appliance and compares it with what the meter and main piping can deliver.
  • Sizing: pipe diameter depends on the total load, the length of the run and the fittings along it, so a long line to a pool heater or generator may need larger pipe than the branch it starts from.
  • Routing: approved pipe or tubing runs through joists and walls, protected where it passes through framing and supported as the code requires, with a shut-off valve at each appliance.
  • Pressure test: the new piping is tested for leaks before anything is covered, and joints are checked again once gas is flowing.
  • Connection and start-up: appliances are connected, lit and adjusted, and their venting is checked.
  • Inspection: where a permit applies, the inspector may need to see the piping before walls or trenches are closed, so plan finishes around that visit.

Gas meter and service capacity: when a new appliance needs a bigger meter or new piping

Your gas meter and the service line to the street were sized for the appliances the house had when gas was connected. A large new load, such as a tankless water heater, a standby generator or a pool heater, can exceed what the meter or the main house piping can supply, especially on a cold day when the furnace and water heater are already running. The fitter should check this before quoting, and if the meter needs upgrading or moving, that part is arranged with the gas utility, which owns the meter and service line.

An undersized system often shows itself as appliances that falter or burn poorly when others start. If you expect to add gas appliances over the next few years, plan them together: sizing one main line for a range, a barbecue and a future generator is simpler than adding branches one at a time, and a capped, tested outlet can wait for the appliance.

Outdoor and underground gas lines: utility locates, private lines and frost

Lines to a barbecue, pool heater, detached garage or generator often run outside, along a wall or in a trench. Before any digging, public utilities must be marked: Ontario One Call says requesting a locate is free, required by law and should be done at least 5 business days before you dig, and in Quebec the Régie du bâtiment du Québec asks excavators to file a free request with Info-Excavation at least 4 business days before work starts.

Public locates stop at the meter. Ontario One Call notes that a privately owned gas line running from a house to a barbecue or pool heater needs a separate private locate, so keep a drawing of where your new line runs and how deep; whoever digs a fence post or garden bed later will need it. Buried piping has to be a material approved for burial, and exposed piping outdoors needs protection from impact, corrosion, falling ice and snow-clearing equipment.

If you smell gas: what Enbridge Gas and Énergir tell homeowners to do

Natural gas has an odorant added so leaks can be noticed, with a smell often compared to rotten eggs. If you smell it, Enbridge Gas says to go outside or leave the area immediately and call its emergency line or 911, and not to turn appliances or lights on or off, use phones or electronics near the leak, smoke or start vehicles. Énergir gives the same advice: leave the building quickly, don't operate any device near the leak, not even a phone or light switch, and call 9-1-1. Never assume someone else has already called.

  • A hissing sound near gas piping, or a patch of dead grass over a buried line, is another reason to call the utility.
  • If a buried line is struck while digging, stop work, move everyone away and call the utility or 9-1-1 from a safe distance, even if no smell is obvious yet.
  • Every new gas appliance is a reminder to test your carbon monoxide alarms, which Health Canada advises in homes with fuel-burning appliances.

Gas Line Installation: frequently asked questions

Can I run the gas line to my dryer or barbecue myself?

No. Adding, extending or hard-connecting gas piping is licensed work in every province, whatever the appliance. A small leak at a joint can go unnoticed for a long time, and a licensed fitter pressure-tests the work and stands behind it.

Do I need a permit for a new gas line?

It depends on the province and the work. British Columbia requires one for gas piping and appliances, including built-in barbecues, and other provinces have their own rules. A licensed contractor knows what applies locally and should obtain any permit and arrange the inspection.

Will adding a gas appliance mean a bigger meter?

Sometimes. Small loads like a range or dryer rarely require one, while a generator, pool heater or tankless water heater may. The fitter compares the total load with the meter's capacity and, if needed, you request the upgrade through your gas utility.

Can a gas line be roughed in now for an appliance I'll buy later?

Yes. During a renovation, a licensed fitter can run and test a line sized for the future appliance and cap it with a shut-off valve. It is connected, tested again and, where required, inspected when the appliance arrives.

How deep does an underground gas line to a pool heater or garage go?

The depth, material and protection are set by the gas code and the fitter's design, not by a single rule of thumb. What matters for you is that the line is recorded on a site drawing and that a private locate is requested before anyone digs near it later.

Sources

  1. TSSA: Authorized heating fuel contractors (Ontario)
  2. CMMTQ: Can you do your own plumbing and heating work?
  3. Technical Safety BC: Homeowner gas permits
  4. Enbridge Gas: Smell natural gas?
  5. Énergir: Emergency
  6. Ontario One Call: Homeowners
  7. Régie du bâtiment du Québec: Excavation work
  8. Health Canada: Carbon monoxide, preventing exposure

Written by the LokalMatch editorial team. Last reviewed September 10, 2026.

Find gas fitters by city

Ontario

Show 71 cities

Quebec

Show 74 cities

What affects the cost of gas line

Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:

  • Type of system and fuel source
  • Size and efficiency of the equipment
  • Condition of the existing ductwork and venting
  • Electrical or gas line changes
  • Access to the furnace room, attic or outdoor unit location
  • Removal and disposal of the old equipment
  • Emergency or after-hours service

How to compare gas fitters before you hire

  • Hire a technician who is licensed for heating, cooling and gas work in your province.
  • For a new system, ask for a load calculation for your home rather than a size based on the old unit.
  • Get written quotes that list the equipment, ductwork changes, removal of the old unit and any electrical work.
  • Ask how they handle service calls and repairs after installation, including in the middle of winter.
  • Compare the full scope of each quote, not only the equipment on it.

Questions to ask gas fitters before you hire

  • Are you licensed for this type of heating, cooling or gas work in my province?
  • How did you decide what size of system my home needs?
  • Does this installation need a permit, and will you take care of it?
  • What does the manufacturer's warranty cover, and what does your labour warranty cover?
  • Will you need to change the ductwork, venting or electrical to make this work?
  • Do you offer maintenance plans, and what do they include?
  • How quickly can you respond if the system stops working?

When to call a pro for gas line

  • If you smell gas, leave the home and call your gas utility's emergency line from outside.
  • If a carbon monoxide alarm goes off, get everyone outside and call emergency services.
  • No heat in cold weather, or a furnace that keeps shutting off
  • Unusual noises, burning smells or a big jump in energy use

Gas line permits and local rules

Some gas line work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.

Permits and licensing

Ready to get gas line quotes?

Tell us about your gas line project.

Do you offer gas line services?

Join LokalMatch to get matched with homeowners in the areas you serve.