Gas Line Installation Cost

We are a free referral service, not a plumbing company - we do not set prices and we never publish a price as our own. What follows is what independent cost-data publishers report nationally, named and linked with the dates they were updated so you can check them yourself. Note that the per-foot and whole-job figures are two different ways of pricing the same work, and a short run to a nearby appliance will not land anywhere near the average.

Fixr also publishes per-linear-foot figures broken out by what the line is feeding, which is a useful way to think about it because different appliances need different pipe sizes and different amounts of gas. A gas range needs relatively little; a tankless water heater or a pool heater needs a lot, and sizing the pipe for the load is the part that is not negotiable.

Two homeowners adding the same gas grill can get quotes that differ by a factor of three, and almost none of that is the plumber's margin. These are the variables that move it.

• Distance from the meter or the nearest point with spare capacity. This is the single largest factor, because the per-foot figures above multiply. A stove ten feet from an existing line and a fire pit sixty feet across a yard are different projects.
• Routing and what has to be opened up. A run through an accessible attic or along a garage wall is straightforward. A run that has to cross a finished ceiling, pass through a slab, or be trenched under a driveway or patio adds labor and restoration.
• Whether the existing system has capacity. Gas pipe is sized for the total load it carries. Adding a tankless water heater or a pool heater often means the existing trunk line is undersized for the new total, and then the upstream pipe has to be upsized too - which turns a short branch into a partial repipe.
• Pipe material. Black iron, CSST (the flexible yellow-jacketed tubing) and in some cases copper each have different labor profiles and different code requirements, including bonding requirements for CSST.
• Whether the meter itself is big enough. If the total connected load exceeds what the meter and regulator can deliver, that is a utility matter and it has its own timeline.
• The appliance connection and shut-off. Every appliance needs an accessible shut-off valve and a proper connector, and existing installations frequently do not have them.
• Permit, inspection and pressure test. Gas work is inspected work, and the test is part of the job rather than an optional extra.
• Whether anything else is open at the same time. If a plumber is already replacing a water heater or has the attic open, adding a line costs materially less in labor than a separate trip.

Gas piping is one of the few areas of residential plumbing where the paperwork genuinely protects you. In Texas, plumbing work including gas piping is performed by plumbers licensed by the Texas State Board of Plumbing Examiners, and new or altered gas piping is permitted and inspected by the city with jurisdiction - which in this area means Dallas, Plano, Garland, Richardson, Irving, McKinney, Frisco, Mesquite, Carrollton or whichever municipality you are in, each running its own building inspection department. Fixr puts the permit itself at $50 to $300 nationally.

The inspection exists because a gas leak is not a plumbing inconvenience. New piping is pressure tested before it is put into service, the test is witnessed or documented, and the inspector checks pipe sizing against the connected load, support, bonding where CSST is used, and the shut-off at each appliance. A homeowner cannot replicate that, and an uninspected gas line is a problem at resale as well as a safety matter.

The practical advice: when you collect quotes, confirm in writing that the price includes pulling the permit, the pressure test and the inspection, and that the work will be done by or under a licensed plumber. A quote that is noticeably cheaper than the others is often cheaper because one of those three is missing. Ask who schedules the inspection and whether the quote covers a re-inspection if something is corrected.

Gas quotes are hard to compare because contractors scope them differently. Asking every bidder for the same itemization fixes that, and it surfaces the capacity question that otherwise appears as a change order halfway through.

1. The appliance list and the total connected load in BTU, including anything you plan to add later - sizing for the future run is far cheaper than redoing it.
2. Whether the existing trunk line and the meter have capacity for that total, and what happens if they do not.
3. The route, the measured length, the pipe material and the pipe size, plus what has to be opened and who patches it.
4. The appliance shut-off valves and connectors, itemized.
5. The permit, the pressure test, the inspection, and whether re-inspection is included.
6. The warranty on labor as well as materials, and how long the price is held.
7. Confirmation that the work is performed by or under a plumber licensed in Texas.

Do not treat this as a DIY project, and do not have it done by someone unlicensed because the number is better. Gas piping is the one part of a house where a small workmanship error - an unsupported run, a joint that was never pressure tested, an undersized line feeding an appliance that then runs rich - produces a hazard you cannot see or smell until it matters. It is also the work most likely to be caught at resale and most likely to void a homeowners claim if it was never permitted.

If you smell gas now, this is not a cost question. Leave the building, do not operate switches, phones or anything that could spark, and call the gas utility's emergency line and 911 from outside. Deal with the pricing afterward.

Dallas Best Plumber is a free referral service, not a plumbing company. Tell us what you want to run gas to, roughly how far it is from the meter, and whether you are adding to an existing system, and we put your request in front of licensed, insured local plumbers who do gas work, with a free, no-obligation quote. The price is theirs - we never set it and we never perform the work.