How much does a whole house generator cost?
Quick Answer
A whole house generator costs $6,000-$15,000 installed. Automatic backup power during outages.
Cost Breakdown
| Service | Low | High | Notes |
|---|---|---|---|
| Generator (11-16 kW) | 3000 | 6000 | Powers most of home |
| Generator (22+ kW) | 5000 | 12000 | Whole house |
| Installation labor | 3000 | 5000 | Pad, electrical, gas |
| Transfer switch | 500 | 1500 | Automatic switching |
Whole House Generator Cost
Standby generators provide automatic backup power.
Sizes and Costs
Small (7-10 kW): $3,000-$6,000. Medium (11-16 kW): $5,000-$10,000. Large (22+ kW): $10,000-$20,000+.
Fuel Options
Natural gas: most convenient. Propane: needs tank ($1,500-$3,000). Diesel: reliable but louder.
Installation
Concrete pad, transfer switch ($500-$1,500), gas connection, electrical. Labor: $3,000-$5,000.
Maintenance
Annual: $200-$500. Professional servicing extends life to 20-30 years.
Related Questions
How big do I need?
16-22 kW for whole house, 10-14 kW for essentials only.
How long can it run?
Natural gas: indefinitely. Propane: 1-2 weeks on 500 gallons.
Does it add home value?
Yes, adds $3,000-$5,000, especially in outage-prone areas.