Natural Gas vs Propane for Outdoor Kitchens
You have two options for fueling your outdoor grill: propane tanks or a natural gas line from your home. Both work, but they offer very different experiences.
Propane: No upfront installation cost. You buy or refill 20-pound tanks ($15 to $25 each) that last 15 to 25 hours of grilling. The downside: you run out at the worst possible time (mid-cookout with guests waiting), you need to drive to a refill station, and storing tanks takes space. Over time, propane costs more than natural gas per BTU.
Natural gas: One-time installation cost of $500 to $2,000 for the gas line. After that, unlimited fuel piped directly to your grill with zero interruptions and zero trips to the store. Natural gas costs roughly 60% less per BTU than propane. The upfront investment pays for itself in 3 to 5 years of regular grilling.
If you grill more than once a week and your home already has natural gas service, running a line to the outdoor kitchen is worth the investment.
What the Installation Involves
A licensed gas fitter or plumber (requirements vary by state — some states require a specific gas license, others allow licensed plumbers to do gas work) performs the installation in three steps:
Step 1: Tap into your existing gas line. The fitter connects a new branch line to your home gas supply, typically at the gas meter or at the manifold inside the house. They verify that your gas meter and supply line can handle the additional BTU load of the outdoor grill. If your meter is undersized (common in older homes), your gas utility may need to upgrade it — usually at no charge.
Step 2: Run the gas line to the outdoor kitchen. The line runs from the connection point through the house wall or foundation and underground to the outdoor kitchen location. Lines are typically black iron pipe (most common), corrugated stainless steel tubing (CSST — flexible and faster to install), or copper (allowed in some regions). The line must be buried at least 12 to 18 inches deep (varies by code) and must be sleeved where it passes through the foundation.
Step 3: Connect to the grill and test. The fitter installs a shut-off valve at the outdoor kitchen and connects the grill. They pressure-test the entire line for leaks using a gauge that detects even tiny drops in pressure. Only after the test passes and the inspector approves does the system go live.
Cost Breakdown
Short run (under 30 feet, through an exterior wall): $500 to $1,000. The simplest scenario — the kitchen is on the opposite side of the wall from an existing gas line.
Medium run (30 to 75 feet, underground): $1,000 to $1,500. Requires trenching across the yard to reach a patio or detached kitchen area.
Long run (75+ feet, complex routing): $1,500 to $2,500. May require going under walkways, around obstacles, or through multiple walls.
These costs include materials, labor, pressure testing, and the gas permit. The permit alone costs $100 to $300.
Why You Must NOT DIY This
Gas work is one of the few home improvement projects where DIY is genuinely dangerous and illegal in most jurisdictions. An improperly installed gas line can leak, causing explosions, fires, or carbon monoxide poisoning. A licensed professional is required by law, and the work must be inspected and permitted. Your homeowner insurance will deny any claim related to unpermitted gas work.
This is non-negotiable. Hire a licensed gas fitter, pull the permit, pass the inspection.
Grill Compatibility
Make sure your grill is compatible with natural gas — most built-in grills come in either a natural gas or propane version. They are NOT interchangeable without a conversion kit, which changes the orifice sizes and regulator to match the different fuel pressure. Some manufacturers include a conversion kit; others sell it separately ($30 to $80). Confirm fuel type before purchasing your grill.
Related Reading
For the complete outdoor kitchen build, check out our patio to outdoor kitchen guide. Use our cost calculator for a personalized estimate.