Cost to Install Whole‑Home Generator
Most homeowners can expect to spend somewhere between $7,000 and $25,000 on a whole-home generator and installation, depending on the generator's size and brand and the complexity of the installation. In this article, we'll dive into the cost to install a whole-home generator in more detail, covering topics such as:
Learn what you need to know to ensure you're making the right investment for your home when installing a whole-home generator.
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Typical Cost Range for Whole-Home Generator Installation
The average cost of whole-home generator installation usually ranges from $7,000 to $25,000, but this can vary widely. Both the generator brand and size — with bigger generators generally costing more — affect the price. For example, a smaller generator that’s only used rarely for backup power is likely to cost less than a full-capacity model. Your location can also be a factor, as a complex installation can increase labor costs, and some cities require permits before work can begin.
Key Factors Affecting Installation Costs
Factors affecting the cost of installing a whole-home generator include:
- Generator size/capacity. Whole-home generators are generally priced by the kilowatt rating. The higher the kW rating, the higher the price. Keep in mind that the size of the generator you need depends on your electrical draw and what you're trying to power with the generator. Someone trying to power a 2,000-square-foot home is going to need a larger generator than someone who just wants to keep essential appliances, such as a refrigerator, running during a power outage.
- Site conditions. How far the installation site is from a utility connection can also impact cost. Other factors to consider include the terrain, soil type and how easy it will be for technicians to access the area.
- Electrical work required. If you need electrical work, such as panel upgrades, transfer switches, or additional wiring, during the installation process, this can drive up the cost.
- Fuel line work. If you don't already have a fuel line running to the installation site, one will need to be added.
- Permits and inspections. Depending on the city and installation requirements, fees for inspections, permits, and access to utilities may need to be factored in.
- Labor and contractor markup. In some cases, there may be electrical, wiring, plumbing, and finish work necessary.
Additional Expenses
When pricing a whole-home generator, many homeowners only consider the price of the unit and the labor cost for the installation. However, there are several other factors that can impact the overall price:
- Concrete pad or mounting foundation
- Enclosures, ventilation, or weatherproof housing
- Fuel storage (propane tanks) and safety components
- Noise control or sound mitigation measures
- Regular maintenance contracts, warranties, and parts
- Sales tax or local fees
Lifespan, Maintenance, and Long-Term Value
The typical lifespan of a whole-home generator is 15-25 years, provided it receives proper care and maintenance. Some of the maintenance tasks you'll need to prepare for include oil changes, battery replacements, load testing, and any other recommended tasks by the technician. While this does mean there are some ongoing costs, most people find these are more than offset by not having to worry about food spoilage, equipment repair, or downtime while the power is off. The peace of mind can be particularly valuable for those who require high power reliability or business owners who want to be able to keep operations going uninterrupted.
How to Choose a Generator and Installer
Use the steps below to choose a reliable generator for your property and a trustworthy installer as you shop around:
- Assess your home’s critical load, including what appliances and systems must stay powered.
- Compare brands for reliability, warranty, and support.
- Interview licensed installers, and ask about references, past installations, and warranties.
- Ensure your service provider will manage permitting, inspections, and compliance.
- Get multiple quotes and ensure transparency in what is included.
Protect Your Home from Outages with Michael & Son
If you're ready to take the first step in the generator installation process, contact Michael & Son for more information. Our experienced team is here to answer your questions and ensure you get exactly what you need.
This blog was written on Dec 01, 2025. Any pricing information is subject to change.
