Whole House Generators costs, by state and province

Typical costs for whole house generators per unit installed. Generator size, fuel type, and transfer switch installation matter. Open a market below for a local estimate.

A whole-house generator costs $3,000–$15,000 installed, with 10–20 kW home standby models costing $3,500–$8,000. Larger 20–30 kW units run $8,000–$15,000 and often require concrete pads and larger fuel tanks. Installation labor, permits, and fuel line runs add $1,000–$4,000.

Generator Size and Fuel Type

Natural gas models cost $2,500–$7,000 for the unit alone; propane models add $500–$1,500 for a storage tank. Diesel units are $4,000–$10,000 but have higher fuel costs.

Install and Transfer Switch

Automatic transfer switch installation runs $500–$1,500. Concrete pad, electrical panel upgrades, and gas line work total $1,500–$4,000 extra.

Maintenance and Long-Term Costs

Annual maintenance runs $150–$300, including oil and filter changes. Expect a 20-year lifespan with proper care, costing roughly $75–$150 per year in parts.

Typical Whole House Generators prices
ItemTypical range
Generator plus installation$3,000 - $15,000
10–20 kW unit only$2,500 - $6,000
Transfer switch + labor$1,000 - $4,000
Annual maintenance$150 - $300

Every market for whole house generators costs

383 markets have a page, each with a typical range where we have one and plain guidance on what moves the price.

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