Gas Line Installation Cost in 2026: What to Expect

Gas line cost scales directly with length. A 10-foot drop from an existing supply line to a new dryer runs $150-$350. A 50-foot run from the meter to an outdoor kitchen costs $800-$1,800. Routing through finished walls, floors, or ceilings adds drilling, patching, and access costs. Underground outdoor runs add trench costs of $5-$15 per linear foot on top of pipe costs.

Black iron pipe is the traditional choice at $1-$3 per linear foot in materials but requires threaded fittings and more labor to install. CSST (Corrugated Stainless Steel Tubing) at $2-$5 per linear foot installs much faster in flexible runs - most plumbers prefer it for residential work. Copper is used in some jurisdictions but restricted or prohibited in others. Local code determines what is allowed.

If your gas meter and service line do not have capacity for additional appliances, a meter upgrade or service line upsizing may be required by the utility. This is utility-managed work and separate from the plumber's scope. Meter upgrades from the utility are often free or low-cost, but the homeowner-side service line upsizing can add $300-$1,500 depending on length.

A standard range or dryer connection is the simplest gas line work. A gas fireplace or insert adds complexity for the gas valve and safety controls. An outdoor gas line for a grill or fire feature requires UV-resistant pipe or underground burial specs. A whole-house generator or pool heater may require sizing the supply line for high BTU demands. Each application has specific code requirements.

All gas line work requires a pressure test (typically 10-15 PSI for residential work) held for a minimum time before inspection sign-off. Some jurisdictions require inspection before the line is covered by drywall or buried. The plumber's time for testing and inspection coordination adds $100-$300. Never occupy an area with an untested gas line.

“Are you a licensed plumber or gas fitter in this state, and do you pull permits for all gas line work?”

Why this matters: Gas line work requires a licensed contractor and permits in every US jurisdiction. Any contractor who suggests skipping permits is creating a serious liability for you.

“What pipe material are you using, and is it appropriate for this application and my local code?”

Why this matters: CSST, black iron, and PE pipe all have specific code requirements for their use. The contractor should be able to explain why they are selecting a specific material for your job.

“Does your CSST installation include bonding, and how are you bonding it?”

Why this matters: CSST requires bonding to the home's grounding system to prevent lightning-induced arcing. This is a code requirement in most states and a safety critical step.

“How will you pressure-test the new line, and do you have a gas detector on site?”

Why this matters: Pressure testing at a documented PSI for a minimum hold time is the only reliable way to confirm there are no leaks. A contractor should describe their specific testing protocol.

“Does my existing gas meter and service have adequate capacity for the new appliance load?”

Why this matters: Adding high-BTU appliances like generators, pool heaters, or multiple fireplaces can exceed existing meter capacity. Ask the contractor to calculate the total BTU load on the system.