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Electrical work
Service size, panel layout, transfer switch location and long conductor runs can change labor and material cost.
Free national planning estimate
Whole-House Generator Installation Cost Calculator
Estimate a realistic installed-price range based on generator size, transfer equipment, fuel work, electrical complexity, distance and site preparation. Then compare the estimate with local installer quotes.
Build Your Installation Estimate
Adjust the project details below. Results update instantly.
Estimated installed range$9,000–$14,000
Planning midpoint: —
Get actual local quotes →This is a national planning estimate, not a contractor bid. It does not include unusual utility upgrades, structural work, major propane storage, financing or every jurisdiction-specific requirement.
What changes the installed price?
The generator itself is only one part of a standby project. A complete quote can include transfer equipment, electrical labor, fuel plumbing, pad/site work, permits, inspections and load-management controls.
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Fuel supply
Existing natural gas or propane nearby is simpler than a long line, meter/regulator upgrade or entirely new propane setup.
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Site & permitting
Generator placement, trenching, grading, bollards, local permits and inspections vary from one property and jurisdiction to another.
Generator installation cost FAQ
What is the average cost to install a whole-house generator?
Generac currently publishes an average installed range of about $8,000–$16,000 including the generator, while noting that actual pricing varies by location and project complexity.
Does a bigger generator always cost much more to install?
Not always. Equipment price usually rises with capacity, but fuel distance, transfer equipment, site work and electrical complexity can create a larger difference than a small step in kW size.
Does the generator price include installation?
Usually not when you are looking at manufacturer MSRP. The complete installed project can include the transfer switch, pad, electrical work, fuel connection, permits, inspections and labor.
Why should I still get local quotes?
Labor, permitting, utility requirements and site conditions are local. A calculator can establish a reasonable planning range, but an installer must inspect the property to provide an exact bid.