Gas line repair cost
Bonding CSST gas lines, fixing damaged gas line coating, and other gas pipe and shutoff fixes.
Many homes run gas through CSST: flexible stainless steel tubing with a plastic coating. CSST needs to be bonded, meaning connected to the home's electrical grounding, so that a nearby lightning strike is less likely to damage it. Unbonded CSST came up in 9% of the homes HomeCloud evaluated, and it's marked as a safety finding.
If you ever smell gas, leave the house and call your gas company or 911 from outside.
What our reports priced these at
| Work | Most homes | Middle price | Based on |
|---|---|---|---|
| Bond a CSST gas line | About $300 | $300 | The 9% of homes where it was priced |
| Fix exposed or damaged CSST coating | $170 to $300 | $220 | Limited number of homes |
What HomeCloud reports priced this fix at in homes we evaluated Sep 2025 to Oct 2026. The range is the middle half of homes; the middle price is the median. Your price comes from a written estimate for your home.
What affects the price
- Distance to the grounding
- The bonding wire runs from the gas line to the home's electrical grounding. The farther apart they are, the more wire and time it takes.
- Getting to the line
- Gas lines in an attic or crawl space take longer to reach.
- Who does the work
- Bonding is electrical work, and repairs to the gas line itself are gas work. Some jobs need both trades.
Common questions
How do I know if I have CSST?
CSST is flexible, ridged tubing with a plastic coating, often yellow or black. It's easiest to spot in the attic, crawl space or basement, or where the gas line connects to the water heater, furnace or range.
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