USA Expert Plumbing

Gas line installation cost (2026)

By USA Expert Plumbing Editorial Team. Updated . 3 min read.

Short answer

Running a new gas line typically costs about $15 to $25 per linear foot for simple indoor runs in 2026, and $35 to $50 or more per foot for complex or underground work. Angi puts most appliance hookups between about $260 and $820, while a new line from the street to a house can cost $2,000 to $10,000 or more.

In this guide
  1. Typical costs
  2. Cost by appliance
  3. Tankless water heaters and gas lines
  4. Pipe materials
  5. What raises the price
  6. Gas line repairs
  7. Signs of a gas leak
  8. Permits and timing
  9. Utility help
  10. How to compare quotes

Gas line work covers a wide range, from a short branch to a new range to a trench across the yard for a generator. The length of the run and how hard it is to reach are what move the price most.

Figures are 2026 national estimates compiled from published cost guides such as Angi, HomeGuide and HomeAdvisor. Prices in high-cost metro areas often run above these ranges.

Gas piping must be installed and pressure-tested by a licensed professional, and most areas require a permit and inspection. This is not a DIY job.

Typical costs

ItemTypical 2026 cost
Simple indoor run, per footAbout $15 to $25
Complex or underground run, per footAbout $35 to $50 or more
Typical appliance hookup (Angi)About $260 to $820
Average project (HomeGuide)About $350 to $2,000
New line from street to houseAbout $2,000 to $10,000 or more
Gas line repair, average (Angi)About $598

Cost by appliance

Each appliance needs its own properly sized branch, shutoff valve and connector. A short run to a range, dryer or water heater sits at the low end. Outdoor kitchens, fire pits, pool heaters and standby generators usually cost more because the runs are longer and often underground.

Tankless water heaters and gas lines

Tankless water heaters need far more gas at full fire than a tank heater. When a home switches from a tank to tankless, the existing gas line is often too small, and upsizing it is one of the most common add-ons in tankless water heater installation cost quotes. An undersized line can cause combustion and ignition codes even on a brand-new heater.

Pipe materials

MaterialWhere it is used
Black iron (steel)Traditional indoor piping; durable but labor-intensive
CSST (corrugated stainless steel tubing)Flexible indoor runs; faster to install; must be bonded per code
Polyethylene (PE)Underground runs outdoors
CopperAllowed in some areas and not others; check local code

What raises the price

  • Length and turns. Every foot and fitting adds labor.
  • Access. Finished walls, ceilings and slabs make routing harder.
  • Underground work. Trenching or boring adds significant cost.
  • Meter or regulator upgrades if total demand exceeds what the meter can supply.
  • Permits and inspection, required in most areas.

Gas line repairs

Repairing a damaged or leaking gas line is priced much like installation, commonly about $15 to $25 per linear foot, and Angi puts the 2026 national average repair at about $598. Removing old piping adds roughly $6 to $7 per foot, and restoring drywall or landscaping afterward can add anywhere from a few hundred to several thousand dollars.

Signs of a gas leak

  • A rotten egg or sulfur smell, which is added to natural gas and propane so leaks can be noticed
  • A hissing or whistling sound near a gas line or appliance
  • Dead or dying plants along an outdoor gas line
  • Bubbles in standing water over a buried line

If you suspect a leak, do not switch lights or appliances on or off. Leave the building and call your gas utility or 911 from outside.

Permits and timing

Most gas line jobs need a permit, commonly around $100 to $300, and a pressure test before the line is put into service. A short appliance branch is often finished in a day; long or underground runs take longer and may need a utility locate before digging.

Utility help

Some gas utilities cover part of a new service line or offer incentives when you add gas appliances. Call your utility before hiring a contractor for a new connection from the street.

How to compare quotes

  • Get at least two written quotes that describe the same work.
  • Ask whether the price includes parts, labor, permit, inspection and cleanup.
  • Ask what warranty covers the parts and the labor.
  • Be cautious with a quote far below the others; ask what it leaves out.

Common questions

Can I run my own gas line?

In most areas, gas line work requires a licensed professional and a permit. Mistakes can cause leaks, fires and carbon monoxide problems.

Does a tankless water heater need a bigger gas line?

Often, yes. Tankless units use much more gas at full output than tank heaters, so the line is frequently upsized during installation.

Was this article helpful?

More in Plumbing costs