Guide · Whole-house generator costWhat a whole‑house generator really costs.
The honest answer is “it depends,” so here’s what it depends on. Answer seven quick questions for a rough size and cost range, then see what drives the price and what a complete quote should include.
Free calculator
Estimate your size and cost.
Pick what fits your home. The estimate updates as you go. When you’re ready, send it to Jamie for a real quote.
What drives the price
Six things that move the number.
- 01
Generator size
The biggest single factor. A unit sized for essentials costs far less than one that runs central air and electric appliances at the same time.
- 02
Transfer switch
An automatic transfer switch is part of every standby install. Its size and type follow your electrical service and the circuits you’re powering.
- 03
Fuel
Natural gas from an existing line is usually simplest. Propane adds a tank if you don’t already have one large enough.
- 04
Distance & site
The farther the generator sits from your meter and gas line, the more wire, conduit and gas piping the job needs.
- 05
Electrical panel
Older or 100-amp panels sometimes need upgrades to work with a standby system.
- 06
Local requirements
Permits and inspections vary by township. Ask any installer what their quote includes.
Comparing quotes
What a complete quote should include.
Two quotes can be thousands apart because they cover different work. Check each one against this list.
- The generator model and size, in kW
- The transfer switch and its amperage
- The pad and placement
- Electrical work from the generator to your panel
- The fuel connection: gas line or propane tank
- Permits and inspections, and who handles them
- Start-up, testing and a walkthrough
- The warranty that comes with the unit
Keeping cost in check
Ways to spend less without cutting corners.
Size for what you need
Essentials-only coverage keeps heat, the fridge and pumps running for a fraction of whole-house cost.
Ask about load management
Load management lets a smaller generator handle big appliances by not running them all at once.
Place it smartly
A spot near the meter and gas line shortens every run of wire and pipe.
Use natural gas if you have it
No tank to buy or fill, and no refills to schedule.
Cost questions
Generator cost, answered.
Still have a question?
Jamie answers every call and request within one business day.
How much does a whole-house generator cost?
Nationally, a complete standby installation commonly runs from the high four figures to well over $20,000, depending on generator size, fuel, the transfer switch, distance and panel work. Use the calculator for a rough range, then get a quote for your home.
Why do generator quotes vary so much?
Quotes often include different things. Some cover the generator only; others include the transfer switch, pad, electrical work, fuel connection and permits. Compare what each quote includes, not just the total.
Is the calculator a quote?
No. It shows national typical ranges and a rough size based on what you enter. Your actual price depends on your home, and Jamie quotes it after a load review.
Does propane cost more than natural gas?
Installation usually costs more with propane if you need a new tank. If natural gas is already at your house, it’s typically the simpler option.
What does a generator cost to maintain?
Plan on a yearly maintenance visit, plus parts like the battery as they wear out. Request a service and Jamie will tell you what to expect for your unit.
Get the real number for your home.
Jamie reviews your panel and what you want running, then quotes the complete install. Replies within one business day, or call (717) 668-9144.