By Project Genie Editorial Team ·
October 1, 2026
Generator pricing is confusing because most published prices quote the machine, not the project. A standby generator is permanently wired in with a transfer switch, gas hookup, and a permit, and those pieces add up to about as much as the generator itself.
Quick answer: A whole-house standby generator installation typically runs $6,000-$18,000 all-in, with many projects landing around $10,000-$15,000. A portable generator hookup with an interlock or transfer switch is a much smaller job. Your bid depends on unit size, fuel type, and how far the generator sits from your gas line and electrical panel.
These are general, typical ranges -- your actual bid depends on the factors below, not a flat average.
Standby vs. Portable: Two Different Jobs
A standby generator is permanently installed, wired to your electrical panel through a transfer switch, and usually runs on natural gas or propane. It typically requires a permit and inspection. A portable generator is a cord-and-plug or interlock setup that you move and fuel yourself. They are different jobs with different bids, so say which one you want in your job post.
Where the Money Goes
| Cost Item | Typical Range |
|---|
| Generator unit | $4,000-$9,000 |
| Transfer switch (installed) | $400-$5,500 depending on type and amperage |
| Electrical labor and materials | $1,500-$5,000 |
| Gas line or fuel hookup | $800-$3,500 |
| Pad and placement | $300-$1,200 |
| Permits and inspection | $150-$800 |
Sizing: Whole House or Essential Circuits?
Generator size is about the load you want to carry, not just the square footage of your home. A whole-house unit powers everything, including large appliances like central air. A smaller unit with load management can cover essential circuits (refrigerator, lights, furnace fan) for less. Running watts and starting watts both matter, since motors briefly draw more power when they start. Tell your Service Professional what you need to keep running, and let them advise on size.
Permits and Inspection Are a Process, Not a Line Item
Standby installs commonly need an electrical permit and sometimes a gas permit, followed by an inspection. Ask who pulls the permit. A permitted, inspected install also matters for insurance and resale, so it is worth confirming up front rather than skipping it.
Why Annual Maintenance Matters
A generator sits idle most of the year, which is exactly when problems build up. Regular service, such as oil changes, battery checks, and test runs, is what makes it start when the power actually goes out.
Getting an Accurate Bid
Project Genie does not sell generators or set prices -- Service Professionals bid on the job you post. Describe:
- Standby or portable, and fuel type (natural gas, propane, diesel)
- What you want powered -- whole house or essential circuits
- Where it would go relative to your gas line and electrical panel
- Whether you already own the unit or want help choosing one
If your power is out right now or a generator needs urgent repair, that kind of job can go through Genie 911, which skips the bidding process and connects you with the next available pro.
Frequently Asked Questions
Why is installation so much more than the generator price?
The transfer switch, electrical work, gas hookup, pad, and permits are all separate from the machine and together often match its cost.
Do I need a permit for a standby generator?
Usually yes, along with an inspection. Ask your Service Professional who handles it.
Can a portable generator power my whole house?
Generally not safely without a proper transfer switch or interlock. Ask a professional to set up the hookup correctly.
How often should a generator be serviced?
Annually is common, since the unit sits idle for long stretches and needs regular checks to start reliably.
Get a Fair Quote, Not a Guess
Generator cost comes down to size, fuel, and installation conditions. Once you have bids in hand, here is how to compare them fairly. Post your generator job free and let Service Professionals bid for it.