Gas line work is the one plumbing-adjacent job that is never DIY — mistakes cause explosions, not just leaks. Installed costs run $500–$2,000+ depending on length, material and whether the line runs inside or underground. This section explains what gas line installation involves, what drives the cost, the permits and inspections required, and how to vet a gas fitter — because with gas, the cheapest bid is not the one you want.
Why gas is pro-only
Gas work requires pressure testing, permits and inspections in virtually every jurisdiction. Licensed gas fitters carry the insurance and the test equipment. Our guides explain the process so you can supervise intelligently — not so you can DIY it.
Smell gas? Act first, read later
Leave the building, don't touch switches or phones inside, and call the gas utility's emergency line from outside. Then read our safety guide. The order matters.