Gas Line Installation in Maryland: Licensing, Costs, and What to Expect
July 5, 2026 · 5 min read · By Deep Dive Plumbing Maryland
Adding a gas appliance, converting from oil to gas, or extending an existing gas line requires licensed work in Maryland. Here is what homeowners in Calvert and Anne Arundel County need to know about gas line installation.
Common Gas Line Projects
Frequently Asked Questions
Who can install gas lines in Maryland?
In Maryland, gas line installation requires a licensed plumber with a gas fitter endorsement, or a licensed gas fitter. Deep Dive Plumbing Maryland's Terry Foster Jr. holds both a Maryland Master Plumber license (#98433) and a Gas Fitter license. Never hire an unlicensed contractor for gas line work — it is illegal and dangerous.
What affects the scope of gas line installation in Maryland?
Gas line installation scope in Maryland varies widely depending on the length of the run, the number of connections, and whether the work is inside or outside the home. Contact us for a free estimate — we provide upfront written estimates before any work begins.
Do I need a permit for gas line work in Maryland?
Yes — a permit is required for most gas line work in Maryland, including new installations, extensions, and modifications. The permit process ensures the work is inspected by the local authority having jurisdiction (AHJ). A licensed plumber or gas fitter will pull the permit as part of the job. Never allow gas line work without a permit — it creates liability and insurance issues.
What appliances can be connected to a gas line?
Common gas appliances in Maryland homes include: gas ranges and cooktops, gas dryers, gas water heaters, gas furnaces and boilers, gas fireplaces and inserts, whole-house generators, outdoor grills and fire pits, and gas-powered backup generators. Each appliance requires a properly sized gas line and shutoff valve.
Can I convert my home from oil to gas?
Yes — converting from oil to natural gas is a common project in Maryland. It requires running a new gas service from the street (done by the gas utility), installing a gas meter, and running gas lines to each appliance. The cost varies by the number of appliances being converted and the complexity of the installation. Deep Dive Plumbing Maryland handles gas line work for conversions throughout Calvert and Anne Arundel County.
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