Of all the parts of a standby generator install, the gas line is the one that varies the most from house to house. Two neighbors buying the same generator can see very different quotes because one has the gas meter right next to where the generator goes and the other has it on the far side of the house. This guide covers what drives gas line cost, published per-foot ranges, and what homeowners on this site have paid by run length.
Published per-foot ranges
Gas line work is usually quoted by the foot, or as a set price for a standard distance plus a per-foot charge beyond it. HomeGuide lists gas line installation at $12 – $25 per foot (HomeGuide, accessed Nov 2026). This Old House puts a natural gas line hookup for a generator at $15 – $20 per foot (This Old House, accessed Nov 2026).
Per-foot prices give you a feel for how much distance matters, but they rarely tell the whole story. The final number depends on the route the pipe takes and what's in the way.
What drives the cost
Distance from the meter
This is the big one. HomeGuide lists distance from the gas meter as one of the main things standby installation costs depend on (HomeGuide, accessed Nov 2026). Where the generator can sit is set by local codes and the manufacturer's instructions, so the spot closest to the meter isn't always an option. Your installer will know the rules where you live.
Trenching and the route
Running pipe underground means digging a trench and putting the yard back afterward. HomeGuide notes complex jobs may require long trenches for electrical conduit and gas pipes (HomeGuide, accessed Nov 2026). Going around a deck, patio, driveway or landscaping adds time. Running pipe along the outside of the house can be shorter but isn't always an option.
Meter and service capacity
A standby generator can draw a lot of gas while it's running, on top of a furnace, water heater or range. Sometimes the existing meter or service can't supply it all. Whether an upgrade is needed is decided by your installer and your gas utility. If it is, ask who arranges it, whether it's in the quote, and whether the utility charges for it.
Pipe size
Longer runs can need larger pipe to deliver enough gas, which costs more per foot. The installer sizes the pipe; you mostly need to know that a long run can cost more than distance alone suggests.
Propane instead of natural gas
For propane, the line runs from the tank instead of the meter, and the tank itself may be a line item. HomeGuide puts propane tanks at $400 – $1,800 (HomeGuide, accessed Nov 2026). See our natural gas vs propane guide.
What homeowners on this site paid, by run length
We ask everyone who reports a cost how long their gas run was. This table shows the gas line part of the cost, grouped by run length, from reports that itemized it. A row shows numbers once it has at least three approved reports.
| Gas-line run (gas line cost) | Median | Reports |
|---|---|---|
| 0–25 ft | Collecting data | 0 |
| 26–50 ft | Collecting data | 0 |
| 51–100 ft | Collecting data | 0 |
| Over 100 ft | Collecting data | 0 |
From approved homeowner reports on this site. A row shows numbers once it has 3 or more reports.
Reading the gas line part of a quote
A clear quote says:
- How many feet the run is, and the route it takes.
- Whether that covers the whole run or a standard distance with extra charges beyond it.
- Whether trenching and restoring the yard are included.
- Whether any meter or service upgrade is included, or who handles it.
If the gas line number looks high, ask what's driving it. A long or complicated route can justify a high price; a short, simple run usually shouldn't cost as much as a long one. Then check your quote against local installs, or look up costs for your ZIP. Our quote breakdown guide lists the other line items to look for.
Questions to ask before you sign
When you compare quotes, the gas line is one of the easiest places for two installers to price different jobs without saying so. These questions help put the quotes side by side:
- How long is the run you measured, from the meter to the generator pad, and does the price change if the actual run turns out longer or shorter?
- Is the line going above ground along the house, or will it be trenched? If trenched, who fills, seeds or patches afterward?
- Does the price include checking whether my meter can carry the generator's load along with my other gas appliances, and any coordination with the gas utility?
- Is the gas piping done by your own licensed crew or by a subcontractor, and is it covered by the same warranty?
- Are the gas permit and inspection included in this line, or listed separately?
Getting the answers in writing makes it much easier to tell whether a higher gas line price reflects more work or just a higher markup.
A note on safety
Gas piping is work for licensed professionals, and your area may require a permit and inspection. This site doesn't give installation, code or safety advice. Use a licensed installer and follow your local codes and permit requirements.
Share your gas run
If you've had a generator installed, report what you paid and include the gas-line run and the gas line cost if your invoice itemized them. Those two numbers together are what make the run-length table above useful.
Sources
- How Much Does a Whole House Generator Cost (2026), HomeGuide. Accessed Nov 3, 2026.
- How To Install an Automatic Standby Generator, This Old House. Accessed Nov 3, 2026.
- Homeowner figures: approved reports on GeneratorCostCheck. How the data works.