PLUMBING
How to Estimate a Gas Line Installation
Contractor method for estimating gas line installation by length, material and connection.
Gas line bids fail on the material and the connection. The length is easy math; copper and listed CSST have different rates, and the utility connection is where the quote grows.
THE SHORT ANSWER
How do you estimate a gas line?
Measure the run, choose copper (~$25/ft) or listed CSST (~$15/ft), then add the connection. A 20 ft copper run with a $500 connection is about $1,000.
Measure the run
Measure the gas line run in ft and note the route. A longer or more complex run costs more. Confirm access for the pipe.
- Measure the run length
- Note the route and obstacles
- Check the existing line size
- Confirm the appliance requirements
Pick the material
Copper runs ~$25/ft and listed CSST ~$15/ft. Copper is durable; CSST is flexible but must use its listed fittings and approved installation method.
Price the connection
The utility connection adds ~$500. Use the Gas Line Installation Cost Calculator to build the quote, then add permits.
Check the total
Your total should land within 10% of the calculator output before markup. Gas work requires a licensed professional.