How much does whole house generator installation cost?

Whole-house generator installation cost is confirmed after an on-site assessment because it varies by generator size, fuel source, and the electrical work required. The biggest driver is capacity (kW) to cover your home’s loads, which sets both equipment and installation scope.

We install and service systems across the Roanoke area, including many Cave Spring homes. A technician will size the unit, review gas or propane routing, and evaluate your panel and transfer-switch approach; in our experience, choosing whole-home vs essential-circuit switching can change labor more than homeowners expect. If your existing unit needs frequent repairs, replacement often lowers lifetime cost. Current offers include $500 off complete generator installs or $500 off Kohler whole-home generators, and a free 200-amp ATS with a new stand-alone whole-home generator, with financing options available.

Typical cost drivers we check:

• kW size and brand of the generator
• Natural gas vs propane fuel setup and line routing
• Transfer switch type and electrical panel upgrades
• Site prep, pad, and distance to utilities

Schedule a load calculation and site walk so we can provide a firm, written quote.

Updated: 2026-10-09

Need help in Cave Spring, VA? Call (540) 238-0320 or book online. "The generator installation went off without a hitch." — Mike F.