Population 715,000 · 6 license-checked installers listed
Prefer to pick installers yourself? Check the box on any listing below to compare a few side by side or request quotes directly from the ones you choose.
Showing 6 of 6 installers. Check the box on any installer below to compare a few side by side or request quotes directly from the ones you pick.
1st Choice Electrical Service is a licensed EC (Electrical Contractor) based in Longmont, CO, serving Boulder County and Northern Colorado. Specializes in KOHLER home standby generator installation, with 200+ generator installations and over 50 years of combined team generator experience.
Aaark Heating & Air Conditioning (d/b/a AAARK Heating, Air & Plumbing) is a Colorado-licensed electrical contractor (License #3656, Status: Active) based in Denver, in business since 1984, offering sales, installation, replacement, service, and repair of residential and commercial standby generators.
Brothers Plumbing Heating Electrical is a Colorado-licensed electrical contractor (License #7510, Status: Active) based in Denver, family-owned since 1980, offering whole-house standby Generac generator installation, replacement, and maintenance for Denver-area homeowners.
Electric Doctor is a licensed EC (Electrical Contractor) based in Englewood, CO, and an authorized Generac dealer providing standby generator sales and installation across the Denver metro area since 1995.
Generator Supercenter of Denver is a licensed EC (Electrical Contractor) based in Parker, CO, specializing in Generac whole-home generator installation and repair, and also services generators of other makes and models regardless of who originally installed them.
The Electricians is a licensed EC (Electrical Contractor) based in Centennial, CO, and a factory-authorized Generac standby generator dealer serving the Denver metro and Front Range. Installs Generac Guardian and Protector series generators on natural gas, propane, or diesel.
The only requirement to appear on this page is a checked state electrical license, confirmed against the state licensing board as part of our approval process, that's why every listing above shows "License checked." Installers are listed alphabetically by default, not ranked by quality, and no installer pays for placement in that order. LumoWatt does not sell ranking. If paid placement is introduced, it will be clearly labeled and will not change the standard list order. Use the sort dropdown above to re-order the list yourself by years in business or how recently we checked a listing. See our editorial policy and listing standards & verification methodology for the full details.
Whole-home standby generator installation in Denver typically costs $8,000-$18,000 all-in. See our full cost breakdown guide for what drives the price up or down, or use the generator sizing calculator for an estimate based on your own home.
This range is a LumoWatt estimate for Denver, not an independently published market study, based on the equipment and labor costs we typically see quoted in this area. Actual quotes vary by home size, generator capacity, and site conditions.
The City and County of Denver requires a Fire Department generator installation permit (filed via the city's e-permits portal, Development Services > Fire - Generator Installation Permit) in addition to standard electrical permitting, with NFPA 110 acceptance testing and documentation required before the unit goes into service. Suburbs like Centennial, Parker, and Littleton run their own separate building departments.
See the full Colorado state permit overview.
Colorado sees severe winter storms and blizzards, spring hail, and increasingly wildfire-driven Public Safety Power Shutoffs from Xcel Energy in high fire-risk areas, on top of routine grid strain. This combination of extreme-weather risk (rather than a single dominant driver like desert heat or hurricanes) is what pushes standby generator demand across the Front Range.
Page data last updated July 25, 2026. Who runs LumoWatt.
