How Much Does Generator Installation Cost in Denver, CO?
A 22 kW whole-house generator costs $9,000 – $14,500 installed in Denver (close to the Colorado average — Denver's large market keeps prices competitive). The primary outage risk is winter storms and hail. Xcel Energy serves the area with approximately 9 hours of outages per year.
Generator Installation Cost in Denver
| Setup | Size | Cost in Denver |
|---|---|---|
| Essential circuits | 10-16 kW | $6,000 – $10,000 |
| Whole house | 20-22 kW | $9,000 – $14,500 |
| Large home | 24-48 kW | $14,000 – $22,000 |
Denver's mile-high elevation means generators lose 15-20% of rated output. Sizing must account for altitude derating. Winter bomb cyclones, summer hail, and wildfire smoke from mountain fires all affect the metro.
Not sure what size you need? Use our sizing guide or interactive calculator for a personalized recommendation. For the full national breakdown, see our installation cost guide.
Denver-Specific Installation Requirements
Local Code — Denver County
Denver follows the IRC. Standard permits. At 5,280 ft elevation, generators derate ~15-20%.
Permits
Permit cost: $100 – $275. Timeline: 1-2 weeks. Your installer handles filing and inspection.
Preferred Fuel: Natural Gas
Xcel Energy provides natural gas throughout the Denver metro.
See statewide Colorado costs and requirements for comparison.
Power Outage Risk in Denver
1.8
Outages/year
5h
Avg duration
Winter storms and hail
Primary risk
Xcel Energy
Local utility
The March 2021 bomb cyclone dumped over 2 feet of snow on the Denver metro, causing scattered outages from heavy wet snow on power lines.
Find Generator Installers in Denver
HomeGen connects you with certified installers in Denver and surrounding areas including Colorado Springs, Aurora and Fort Collins. Get 2-3 quotes to compare pricing — installation costs vary by up to $3,000 between contractors in the same city.
How Much Does a Home Generator Cost?
Get an instant estimate based on your home size and power needs.
Recommended size
22 kW
Estimated cost
$7,700 – $12,100
Includes equipment, installation, transfer switch, and permits
As low as $83/month with approved financing
Prices vary by location. Enter your ZIP code for local estimates.
FAQ — Generator Installation in Denver
How much does a generator cost in Denver?
A 22 kW generator costs $9,000-$14,500 installed. Competitive Front Range pricing.
Does altitude affect my generator?
Yes. At 5,280 ft, expect 15-20% power derating. A 22 kW unit effectively produces ~18 kW. Consider oversizing to 24 kW.
Natural gas or propane?
Natural gas via Xcel Energy for nearly all Denver homes.
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