How Much Does a Whole-House Generator Installation Cost in Denver, CO? [2026 Data]

The average cost to install a whole-house generator in Denver is $1,865, with prices often ranging from $662 to $3,068, depending on generator size and type. Having a whole-house generator to back up your home's power can make all the difference in Denver. Occasional high winds and fluctuating weather can make life unpredictable and lead to power outages that cause property damage.

Whole-Home Generator Installation Cost Factors 

Several factors influence the cost of installing a whole-home generator in Denver, Colorado.

Size

Use this chart to help you estimate the total cost of your whole-house generator by size and capacity.

Generator Type

There are several types of generators worth considering when determining whether a whole-house generator is right for you.

Power Type 

On average, you’ll spend about $20 to $200 daily to run a 15-to-20-kW whole-house generator in Denver. But not all fuels are alike, and depending on the brand and fuel you choose, you might spend far more than you expected in fuel costs. 

Here is how much each fuel type costs per year or unit:

Whole-House Generator Installation Pro Costs

When you hire a generator installation pro in Denver, Colorado, expect to pay an average of $190 per hour. For smaller installations that only take a half day or so, this can add a few hundred dollars to your total. For more complex, multi-day installations, you could pay up to $10,000 for labor alone.

The investment is worthwhile, however, since pros can assure that your whole-house generator installation is to code in Denver and meets your backup power needs in a safe and efficient way. The professional installation process involves several services:

• Site evaluation

• Load calculation to determine what size generator you need

• Permit applications

• Utility hookup coordination

• Ordering and scheduling equipment deliveries

• Installing and curing a concrete pad

• Placing and connecting the generator to utilities

• Testing the system

Does Installing a Whole-House Generator Increase Home Value?

If you live in an area that experiences frequent outages, expect the average return on investment (ROI) for a whole-house generator to be roughly 3% to 5% of your property value.

Some other pros of generators are that they help prevent additional costs, such as damage from frozen pipes, sump pump failures, spoiled food, and lost work-from-home hours. They can also help keep medical equipment operational.

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 survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from 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. 

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