Service · Directory of Plumbers
Gas line work
Gas line work, new runs for ranges, dryers, water heaters, fireplaces, grills, and generators, plus repair of existing piping, is licensed, permitted work in nearly every jurisdiction this directory covers, and in several states it needs a specific gas classification or endorsement. If you smell gas, do not book a service: leave the house and call your gas utility's emergency line or 911 from outside.
A proper gas job is sized first (total appliance load in BTU against run length, from the fuel gas code tables), built from approved materials (black iron, bonded CSST where used, polyethylene underground with tracer wire), fitted with a shut-off at each appliance, pressure tested, and inspected before the line is covered or buried. A quote missing any of those elements is missing the job.
What a complete gas line work job includes
- Load calculation and line sizing for present and stated future appliances
- Installation in approved materials, with CSST bonding where CSST is used
- Shut-off valve and sediment trap at each new appliance connection
- Pressure test, documented for inspection
- Permit and inspection before the line is covered, buried, or put in service
Cost frame
A gas line installation or extension typically runs $600 to $2,500 per run, including pipe, labor, permit, and pressure test as quoted. Long, underground, or finished-wall runs price above the range; reusing an existing correctly sized line for an appliance swap prices well below it.
Full table: plumber cost guide.
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Questions about gas line work
Can a handyman do gas line work?
In nearly every covered jurisdiction, no: gas piping requires a licensed plumber or gas fitter working under a permit, sometimes with a specific gas endorsement. Unpermitted gas work is an uninsured liability, and its consequences in a loss fall on the homeowner.
What should I do if I smell gas?
Leave the house immediately. Do not operate switches, appliances, or phones inside. From outside, call your gas utility's emergency line or 911. Let the utility make the scene safe; repairs after that are licensed work with a permit and a retest.
What is a pressure test and why does it matter?
The new piping is pressurized with air or inert gas and must hold pressure for a set period, proving the joints are sound before gas is introduced. It is the test the whole permit process is built around, and it should be documented on your paperwork.
Go deeper
The full guide: Gas line work guide and reference. Licensing for this work in your state: licensing by state.