The two main ways to replace a gas line without excavation
You can replace a gas line without digging by either pulling a new line through the existing pipe (called pipe bursting or horizontal directional drilling) or running the new line above ground along your house exterior. Which method works depends on where the old line runs, what condition it is in, and whether your local gas company or a licensed contractor handles the work.
Most homeowners cannot do this work themselves — gas line replacement requires a licensed plumber or gas fitter, a permit, and an inspection. Your gas company may do the work from the meter to the street at no cost, but the line from your house to the meter is usually your responsibility.
Key Takeaways
- Pipe bursting and horizontal directional drilling are the two no-dig methods, and which one is possible depends on the depth, material, and location of your existing line.
- You must hire a licensed gas plumber or fitter — this is not a DIY project — and you will need a permit and inspection before and after the work.
- Above-ground replacement along the exterior of your house is cheaper and faster than no-dig methods but changes the appearance of your property.
- Call your gas company first to locate the line and clarify which section you own; they may cover the cost of their portion.
- Costs for no-dig methods typically range higher than traditional digging, so get quotes from at least two licensed contractors before deciding.
Pipe bursting: pulling a new line through the old one
Pipe bursting works by attaching a new gas line to a pulling head that breaks apart the old pipe as it is dragged through the ground. The old pipe fragments stay in place underground, and the new line takes its path. This method works best on lines that are 2 to 4 feet deep and made of steel or iron.
The contractor will excavate small access pits at the start and end of the section being replaced — usually at your meter and at the property line or street. A hydraulic machine then pulls the new line through, shattering the old one. The entire process typically takes one to three days, depending on the length of the line.
Pipe bursting costs more than standard digging but less than horizontal directional drilling. You will still see some surface disruption at the access points, but the rest of your yard remains undisturbed. This method does not work if the old line is plastic (PVC or polyethylene) because it will not shatter cleanly.
Horizontal directional drilling for longer runs
Horizontal directional drilling (HDD) bores a path underground without breaking the surface along the entire route. A drill rig creates a pilot hole, then enlarges it and pulls the new gas line through. This method works on lines of any depth and any material, and it causes almost no surface damage.
HDD is the most expensive no-dig option because it requires specialized equipment and an experienced operator. It is most practical for long runs — 100 feet or more — where the cost per foot becomes more reasonable. The drill rig itself is large and needs clear access to the start point, so your yard must have space for the equipment.
The process takes two to five days. A small access pit is dug at the start and end, but the path between them remains untouched. This method is often used when the old line runs under a driveway, patio, or landscaping you want to preserve.
Running the new line above ground along your house
The simplest and cheapest option is to run the new gas line above ground along the exterior wall of your house from the meter to your appliances. The line is attached to the wall with brackets and is typically painted to match or blend in. This avoids digging entirely and can be done in a single day.
Above-ground lines must meet code requirements: they need to be protected from physical damage, kept away from electrical lines, and properly supported with brackets every 4 to 6 feet. The line cannot run through windows or doors, and it must be accessible for inspection and maintenance.
The trade-off is appearance — a visible gas line running up your house exterior is not as invisible as an underground line. However, if your old line is failing and digging is not practical, this is often the fastest and most affordable solution. Some homeowners choose this route temporarily while planning a full replacement later.
Getting your gas company and a contractor involved
Call your gas company first. They will locate your line for free using a marking service (usually called 811 in the United States — call before you dig). They will also tell you which section of the line they own and maintain. Most gas companies own the line from the street to your meter; you own the line from the meter into your house.
Your gas company may replace their section at no cost if it is failing. For the section you own, you will need to hire a licensed plumber or gas fitter. Ask for at least two quotes and confirm that each contractor is licensed, insured, and familiar with your local gas code. Some contractors specialize in no-dig methods; others may push you toward traditional digging because that is what they know.
You will need a permit from your city or county before work begins. The contractor usually handles the permit process, but confirm this in writing. After the work is done, a gas inspector will test the new line for leaks and proper pressure before your gas is turned back on.
Cost comparison: no-dig versus traditional digging
Traditional digging is usually the cheapest option — typically $1,500 to $5,000 for a 50-foot residential line, depending on soil conditions and obstacles. Pipe bursting costs 20 to 40 percent more. Horizontal directional drilling costs 50 to 100 percent more than digging, but the price per foot drops on longer runs.
Above-ground replacement is usually the least expensive option overall, often $500 to $2,000 for materials and labor, because no digging or specialized equipment is needed. However, if you later want to bury the line, you will have to pay for the full replacement again.
Get written quotes that specify the method, the length of line being replaced, what is included in the price, and what permits and inspections are covered. Ask whether the quote includes capping or removing the old line and restoring the surface at access points.
What happens if the old line is damaged or leaking
If your old gas line is leaking, your gas company will shut it off at the meter. You cannot use gas until the line is replaced. This makes the repair urgent but does not change your options — you still need a licensed contractor and a permit.
If the line is damaged but not leaking, you have more time to plan and get quotes. However, do not delay — a damaged line can fail suddenly, and an emergency repair will cost more and may limit your choice of methods.
Some contractors offer emergency service at a premium rate. If you need the line replaced within 24 hours, expect to pay a rush fee. Planning ahead and getting quotes before an emergency occurs will save you money and stress.
Frequently Asked Questions
Can I replace a gas line myself?
No. Gas line work requires a license, a permit, and an inspection. Improper installation can cause gas leaks, carbon monoxide poisoning, or explosions. Hire a licensed plumber or gas fitter in your area.
How long does a gas line replacement take?
Above-ground replacement takes one day. Pipe bursting takes one to three days. Horizontal directional drilling takes two to five days. The timeline depends on the length of the line, soil conditions, and how quickly the permit and inspection are scheduled.
Will my gas be shut off during the replacement?
Yes. Your gas company will shut off service at the meter before work begins. The line will be tested and inspected before gas is turned back on, which usually happens the same day or the next day.
What if my old gas line runs under my driveway or patio?
Horizontal directional drilling is the best option because it avoids breaking up the surface. Pipe bursting is also possible if the line is steel or iron and not too deep. Above-ground replacement avoids the problem entirely but means running the line along your house exterior instead.
How do I know if my gas line needs replacement?
Signs include the smell of gas near the line, hissing sounds, dead patches in your yard, higher gas bills, or visible corrosion on above-ground sections. Have a licensed plumber inspect the line if you notice any of these signs.