The cost to install a generator transfer switch depends on several factors. Our guide will help you understand all of the costs.
How Much Does a Natural Gas Generator Cost? [2025 Data]
Normal Range: $10,000 - $13,000
The average natural gas generator costs $12,000, but it can range between $10,000 and $13,000, depending on labor and capacity.
How we get this data
Photo: 为轩 张 / Adobe Stock
Photo: 为轩 张 / Adobe Stock
The average natural gas generator cost is $12,000, though installation prices can range anywhere between $2,000 and $25,000. Natural gas generators are whole-home standby generators that are connected to your home’s natural gas line. Since they run on natural gas, they offer the advantage of a virtually unlimited fuel supply, making them a convenient and long-term solution for emergency power. This guide will cover average costs and other considerations when planning your budget.
National Gas Generator Cost Factors
Here are the main factors to consider when installing this type of generators.
Types
Most natural gas generator installations feature an automatic transfer switch that detects an outage and starts the unit automatically. While uncommon, manual start units cost significantly less, but are not suitable for homes with frequent outages.
| Generator Type | Description | Average Cost |
|---|---|---|
| Manual Start | Powered via a pull cord or electrical switch; only suitable for homes with rare outages | $2,000–$4,000 |
| Automatic Start | Wired into the electrical panel via an automatic transfer switch | $2,000–$25,000 |
Size
The size of the natural gas generator directly impacts your budget for this installation. Larger units provide more power but require a larger initial investment.
| Generator Size in Kilowatts | Average Cost |
|---|---|
| 7.5–10 | $2,000–$3,500 |
| 14–18 | $4,000–$5,500 |
| 20–24 | $5,000–$6,500 |
| 26–32 | $6,500–$15,000 |
| 36–38 | $14,000–$16,000 |
| 45–48 | $16,200–$25,000 |
Labor
Hiring a licensed local general contractor is essential for a safe and code-compliant natural gas generator installation. Labor costs will depend on factors like local rates, permitting requirements, and whether any additional electrical work is needed.
National Gas Generator Ongoing Costs
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Apart from the initial upfront investment, these are a few ongoing costs to consider when planning your budget for a natural gas generator.
Operating Costs
Costs for operating a natural gas generator range anywhere from $2,000 to $21,000 per year. Actual operating costs can vary significantly depending on the size of the generator, frequency of use, and fuel prices. If your generator is running frequently due to power outages, the annual operating costs will increase accordingly.
Repairs
Repairs for natural gas generators range between $500 and $3,000 per year. The cost of repairs will vary based on the extent of damage or malfunction. While well-maintained generators often experience fewer issues, it’s important to budget for unexpected repairs.
Maintenance
Regular maintenance for your natural gas generator costs between $200 to $1,000 a year. Maintenance tasks include oil changes, battery checks, and air filter replacements. This is one additional expense that you won’t want to skip, as it ensures the safety and functionality of your generator, helping you get the most from its lifespan.
DIY National Gas Generator Installation vs. Hiring a Pro
DIY installation is not an option for natural gas generators. These units must be connected to both your home’s natural gas line and main power supply, making the installation highly technical and requiring compliance with local building codes and safety regulations. Improper installation can lead to serious hazards, such as gas leaks, carbon monoxide exposure, and electrical failures.
A professional who installs generators ensures the generator is correctly sized, securely installed, and safely integrated with your home’s electrical system, preventing potential hazards and ensuring compliance with local code regulations.
5 Ways You Can Save Money on a National Gas Generator
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Follow these tips to cut down the cost of investing in a natural gas generator.
Calculate the electrical load of your necessary systems, appliances, and electronics to avoid purchasing a unit with a larger wattage capacity than necessary.
Schedule your generator installation during a contractor’s slow season (late winter or early spring) for potential discounts.
Opt for a manual transfer switch (when feasible) if you don’t mind manually switching power.
Get several quotes from licensed contractors to find the best deal before hiring.
Schedule regular maintenance visits for your generator to avoid costly repairs and extend its lifespan.
How Angi Gets Its Cost Data
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
Frequently Asked Questions
The homeowners guide to generator installs
From average costs to expert advice, get all the answers you need to get your job done.
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