Average Cost Range
$3,000 – $15,000
National Average
$7,500
Generator installation costs between $3,000 and $15,000 for most homes, with the national average around $7,500 for a whole-house standby unit. Portable generators cost much less ($500–$2,000) but provide limited power. The generator size, fuel type, and installation complexity are the main cost factors.
Cost Breakdown
| Item / Type | Low | High | Average |
|---|---|---|---|
| Portable Generator | $500 | $2,000 | $1,200 |
| Inverter Generator | $1,000 | $3,000 | $2,000 |
| Standby Generator (7–12 kW) | $3,000 | $6,000 | $4,500 |
| Whole-House Generator (16–22 kW) | $5,000 | $12,000 | $8,000 |
| Large Whole-House (24+ kW) | $8,000 | $18,000 | $12,000 |
| Transfer Switch Installation | $500 | $1,500 | $900 |
| Gas Line Installation / Extension | $500 | $2,500 | $1,200 |
| Concrete Pad | $200 | $800 | $400 |
Labor Costs
Generator installation labor costs $1,500–$3,500 including electrical work, transfer switch installation, and fuel line connections. Licensed electricians and plumbers are typically required, and permits add to the process.
Factors That Affect Generators Cost
Generator Size (kW)
Generator capacity is measured in kilowatts. A 7–12 kW unit powers essentials, while a 16–24+ kW unit can run an entire home. Larger units cost more for both equipment and installation.
Fuel Type
Natural gas generators are convenient if you have a gas line. Propane requires a storage tank ($500–$2,500), while diesel units cost more upfront but are more fuel-efficient for extended use.
Electrical Work
Installing an automatic transfer switch and connecting the generator to your electrical panel is a significant portion of the labor cost. Upgrading an older electrical panel adds $1,000–$2,500.
Fuel Line Installation
If your home doesn't have a gas line to the generator location, running a new line costs $500–$2,500 depending on distance and local codes.
Local Codes & Permits
Generator installation requires permits in most jurisdictions. Setback requirements, noise ordinances, and fuel storage rules vary by location and affect installation options.
Tips To Save Money On Generators
Right-Size Your Generator
Don't pay for more capacity than you need. Calculate your essential power needs and choose accordingly—a 10–12 kW unit covers most essentials at a fraction of the cost of a full-house unit.
Use Natural Gas if Available
Natural gas eliminates the need for a propane tank and provides unlimited fuel supply. This saves $500–$2,500 on tank installation and eliminates ongoing propane delivery costs.
Bundle With Electrical Upgrades
If your electrical panel needs updating, combining it with generator installation saves on electrician mobilization costs. Many electricians offer package pricing.
Compare Brands
Generac, Kohler, and Briggs & Stratton offer generators at different price points. While quality varies, mid-range options from reputable brands provide excellent reliability without premium pricing.