Cost ranges for built-in generators typically span from basic packages to full turnkey systems. A modest setup with natural gas and a mid sized output might run around $9,000 to $12,000 installed, while high performance modes with larger outputs and lighting controls can exceed. Quick answer: In 2025, a typical whole house generator installation costs $6,000–$30,000, driven by generator size (kW), brand, transfer switch, electrical upgrades, fuel line/permits, and local labor rates. In comparison, portable. Most home generators cost between $400 and $23,000+, depending on the type, size, and installation. Trusted Home Depot partner for more than 15 years. This will power a few emergency systems but not an entire home, and might be manually operated.
Our products and installation services come with industry-leading warranties so you can sleep soundly at night knowing your new generator is covered by The Home Depot. Use this guide to learn more about the cost of generator installation for your home. Based on unit size, installation costs can range from $5,000-$12,500.
How much does a Generac Generator cost?
Protects the generator's base from rodents and insects. Generac generators cost $2,000 to $5,000 for a 7 to 24 kW whole-house unit, plus $3,000 to $5,000 for installation. Generac's standby generators turn on automatically during power outages and run on natural gas or liquid propane.
Let me guess – you saw a Generac commercial during the game, thought “Hey, that sounds smart,” then Googled the price and nearly choked on your beer. Here's the brutal truth: You're looking at $6,000 to $15,000+ for a proper whole-house setup. I know, I know. That's more than some people's cars.