How much does it cost to cap a gas pipe?

Author: Prof. Gwen Dietrich  |  Last update: Wednesday, March 19, 2025

Capping a gas line costs $125 on average, depending on how easy it is to access the line. Most spend between $75 and $150. Whether you're tired of keeping the furnace pilot light alive or simply want to try an electric oven, there are a few reasons why you may not need the gas line for your home.

How much does it cost to get a gas pipe capped?

In the past 12 months the average price of a cap off job is £191. In the last 12 months the price for a job in and around London has ranged from between £118 and £510. You might need to cap off the gas pipe in London as part of fitting or removing an appliance. Or it might be that your appliance has a fault.

How much does it cost to cap off a gas line?

Depending on your region and its local codes, you may pay between $25 and $100. To avoid a gas leak or other hazards, some cities take the job of permanently adjusting or capping a gas line out of the hands of homeowners. Instead, they require hiring a professional gas plumber. Can you leave a gas line uncapped?

How much does it cost to seal a gas line?

Sealing a gas line to fix minor leaks can cost between $150 and $600.

Is it safe to leave a gas line uncapped?

Any gas line not in use should be capped or plugged. If it will never be used again it should be removed entirely.

Installing Gas Pipe

Who can cap off a gas pipe?

Are you wondering, “Am I allowed to put a stop end cap on the gas pipe?” Whenever you're dealing with gas, always hire a registered Gas Safe engineer for the job. They can carry out any work that affects your gas pipes or gas appliances.

Can you leave a gas pipe exposed?

If you've recently had a new boiler installed or a home extension built, you may now have exposed gas pipes on your exterior property wall. Although this is perfectly safe and normal, you may wish to conceal the pipework to enhance the visual aesthetic of your home exterior.

What does capping a gas line mean?

Capping a line involves removing any old appliance attached to the pipe and putting an airtight seal on the end of the line. This “cap” firmly blocks the gas line so no gas can leak out into your home.

How much does it cost to reroute a gas line?

You can expect to pay between $375 and $750, or $15 to $25 per linear foot, to move a gas line on average. The further you need to move the line, the more it will cost. The cost to move a gas line ranges from $15 to $25 per linear foot, with an average cost of about $375 to $750 for the whole project.

Who disconnects gas lines?

The Gas Network Operator (GNO) is responsible for the gas pipe that comes from the gas main into the property. Some time after your gas has been disconnected, they'll likely visit your property to check things out, and might decide to disconnect the gas pipe that runs into the house from the gas main in the street.

Do I need a plumber to cap a gas line?

A plumber or certified gas technician is responsible for capping gas lines. Gas lines require expertise and understanding of safety standards to ensure it's properly sealed.

Why are gas lines so expensive?

Gas line installation breaks down to material, labor fees, and permits. The complexity of the project will influence your costs. For instance, deeper trenching work will take longer and cost more labor fees.

How much does a gas cap leak cost?

The average cost for a Gas Cap Replacement is between $112 and $117. Labor costs are estimated between $18 and $22 while parts are typically priced around $94.

How much does it cost to cap a gas line?

Capping a gas line can be necessary if you are ending your gas service and switching to electric or if you want to cap off an unused section of piping to avoid leaks. This process should only take around 30 minutes and should cost you $75 to $150, though certain urban areas will see higher prices.

How to get gas uncapped?

If the cap is on the internal pipework (i.e. after the meter), you'll need to contact a private Gas Safe-register engineer to take it off. If you're a tenant, get in touch with your landlord or managing agent.

Can a homeowner install their own gas line?

Installing a gas line is no easy task and should be done by a professional. If gas piping is installed improperly it could lead to health and fire hazards.

Is gas cheaper than electric?

On average, natural gas is cheaper than electricity, so a gas furnace will save money on your bills. Electrical furnaces often run quieter than gas furnaces, as they have less mechanical parts used for the conversion of fuel to heat. Electrical furnaces, by and large, are safer.

Can a capped gas line leak?

They can leak, yes, but not likely just to being 10 years old. You can give it a tighten with a wrench and see if the soap bubbles stop - if so, great, good job, well done. Otherwise, call a plumber.

How do you disconnect and cap a gas line?

How to Turn off the Gas:
  1. Find the gas meter. ...
  2. Locate the main valve. ...
  3. Turn off the valve. ...
  4. Turn off the gas line. ...
  5. Remove fittings and any additional piping. ...
  6. Clean the pipes with steel wool. ...
  7. Apply Teflon pipe dope or tape to the cap. ...
  8. Use the appropriate cap.

Can you build over top of a gas line?

Please be advised that building a structure over – or too close to – a natural gas pipeline is a safety hazard and an unacceptable building practice that may be in violation of federal pipeline safety regulations.

Can I run a gas pipe around the outside of my house?

You can absolutely run a gas pipe externally, as long as it is properly clipped and sleeved to the wall. Running gas pipes on the outside of your property – rather than through the property's interior – is commonplace. In fact, it's become standard now when re-routing gas pipes.

How many years does gas pipe last?

A natural gas line can last as long as fifty years, even longer. But, being buried underground, they will corrode, become worn, and start to crack as the metal weakens. This can often start between 20 and 30 years. When you begin noticing a leak, the gas line repairs should be done by a local plumbing professional.

What should I do if I've been exposed to a gas leak?

If you detect any of the following signs of a natural gas leak in your house or think you have been exposed, contact 911 immediately. The smell of rotten eggs. In its natural state, natural gas is odorless and colorless.

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