Louisville is served by Xcel Energy, so if you smell gas, leave the house and call Xcel at 1-800-895-2999, and call 911 as well. For repairs and new lines on your side of the meter, call the number on this page to be connected with a local plumber in Louisville.

What the call looks like
The number on this page puts you in touch with an independent plumber who handles gas piping in Louisville. Have a short description ready: the appliance, the location of the meter, and whether the home is an older house near downtown or one rebuilt after the fire. If there is a gas odor, the first step is to leave and call Xcel Energy and 911. For planned work, the plumber looks at the existing piping and explains the permit and inspection.
Price factors
- Run length and access through finished space
- Condition of older pipe in historic homes
- Upsizing for added appliances
- Outdoor lines and trenching
- City permit and inspection
Louisville conditions
Louisville is a former coal-mining town in southeastern Boulder County that became a suburban residential community, with a historic downtown on Main Street. Hundreds of homes were rebuilt after the December 2021 Marshall Fire, so some neighborhoods now have brand-new gas systems next to houses whose piping has aged for decades. Older homes near downtown can have iron pipe extended through several remodels; rebuilt homes usually have flexible tubing and modern appliances.
A City of Louisville notice describes Xcel Energy gas service to Louisville and Superior and gives Xcel's gas odor line, 1-800-895-2999, with 911 for any life-threatening emergency.
The City's Building Safety Division at City Hall, 749 Main Street, issues building permits through its online portal and performs plumbing inspections along with building, electrical and mechanical inspections.
Checklist
- Find the meter and main shutoff
- Clear access to the furnace, water heater or appliance
- Have permit records from a rebuild, if you have them
- Note any finished ceilings that cover gas lines
- Gather appliance specs for anything new
If your home was rebuilt, keep the permit and test records; they show how the gas system was sized, which helps when adding an appliance later. Plan non-urgent work for late summer, ahead of heating season.
If you live in an older house next to rebuilt ones, it is easy to assume your system is fine because the street looks new. It is still worth a pressure test and a look at exposed piping, connectors and shutoffs if the house has not had one in years, particularly before adding a range, generator or outdoor line. Older homes that had smoke exposure during the fire but were not rebuilt deserve the same check.
Gas Line Services questions in Louisville
I smell gas inside. What should I do before anything else?
What do plumbers tend to find in the gas piping of older homes?
Does gas piping work here need a permit?
Can a gas line be run outside for a grill, fire pit or patio heater?
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