A whole house generator costs $7,000 to $20,000 installed in 2026
Most homes buy a 22 kW standby generator and pay $10,000 to $14,000 all in. The generator itself is only about 40 percent of that. The rest of the standby generator installation cost is the transfer switch, the gas line, the pad, the permit and two licensed trades.
Cost by size and by line
| Generac with transfer switch, equipment only | Catalog prices checked Sept 8, 2026: $4,619 for 10 kW, $5,949 for 14 kW, $6,769 for 18 kW, $7,369 for 22 kW, $7,789 for 24 kW and $8,219 for 26 kW. |
|---|---|
| 14 to 22 kW installed | $7,000 to $12,000 in one April 2026 guide. |
| 22 kW installed | $10,000 to $14,000 for most homes. Guides range from $8,500 to $13,000 up to $10,000 to $18,000. |
| Essential circuits only | $7,000 to $12,000 with a smaller unit. |
| Large or complex, 30 kW and up | Over $25,000. |
| Installation labor | $2,500 to $4,000 for a standard job in one contractor guide. $4,000 to $7,000 in another that counts permits, pad, wiring and gas line. |
| Automatic transfer switch | $700 to $1,500. |
| Concrete or composite pad | $300 to $600. |
| Permits and inspections | $150 to $400 in one Nevada guide. More in strict coastal counties. |
| Yearly maintenance | $200 to $400. |
| Portable generator with a manual transfer switch | $1,500 to $3,500 installed. No automatic start. |
What pushes a quote up
| Size in kW | The biggest driver of the unit price. Most homes need 13 to 22 kW. |
|---|---|
| The gas line | About 15 percent of a typical job. A 22 kW unit needs more gas than many existing lines can deliver. |
| Your panel | An old or full panel can mean a service upgrade before the transfer switch goes in. |
| Where you live | One guide puts the same 22 kW install at about $7,500 in rural Texas and $12,000 to $14,000 in coastal Florida, where pads and tie downs are storm rated. |
| Distance | Every foot between the generator, the gas meter and the panel is trench, pipe and wire. |
Whole house generator cost by region
| Lower cost states | $8,000 to $11,200. Alabama, Arkansas, Indiana, Iowa, Kansas, Kentucky, Mississippi, Missouri, Oklahoma, Tennessee, West Virginia and most rural areas. |
|---|---|
| Average cost states | $10,000 to $14,000. Arizona, Florida, Georgia, Michigan, North Carolina, Ohio, Pennsylvania, Texas, Virginia and most mid size cities. |
| Higher cost states | $13,000 to $18,200. California, Connecticut, Hawaii, Massachusetts, New Jersey, New York, Washington, plus big metros such as Chicago, Denver and Washington DC. |
These rows are our estimate. We took the typical national range and adjusted it for local labor costs, which run about 20 percent lower in the cheapest states and about 30 percent higher in the dearest ones. In storm prone states, prices and wait times jump after every big outage.
Why a $7,369 generator becomes a $14,000 project
The number online is the box. One April 2026 guide splits a typical install like this: about 40 percent is the unit, 25 percent is the transfer switch and electrical work, 15 percent is the gas line, 10 percent is the pad and permits, and 10 percent is other labor. That is how a 22 kW Generac listed at $7,369 with its switch turns into a five figure job.
It is also why bids are hard to compare. One June 2026 guide found bids that differed by $4,000 on the same unit, because one included coordinating a bigger gas meter with the utility and the other left it as the owner's job. A quote that says only 22 kW Generac installed, $11,500, is not detailed enough to compare with anything.
Whole house and standby mean the same machine
People search for both. A standby generator is the permanent unit that sits outside on a pad and starts by itself when the power drops. A whole house generator is a standby generator big enough to run everything at once. A smaller standby unit wired to a few key circuits is the same idea for less money, at $7,000 to $12,000.
Do you need 22 kW
One Nevada electrician says owners often buy a 22 kW unit when a 16 or 18 kW unit would carry the real load. The price gap between sizes is modest, but fuel use and engine wear follow the size. Ask for a load calculation based on the circuits you want covered, not on square feet.
Why this costs more in 2026
A generator is an engine, copper windings and a steel case, and the install needs a trench and a truck. Gas line pipe, wire and concrete all cost more to move this year.
The short version is oil. Diesel passed $6 a gallon on the AAA national average for the first time on September 11, 2026. A year earlier it was about $3.70 (CBS 8 reporting AAA). That lands in trip charges, deliveries and anything made from petroleum. In March 2026, construction input prices were up 4.8 percent on the year, the biggest annual gain since January 2023, according to Associated Builders and Contractors, and the Associated General Contractors measured a 37.8 percent one month jump in diesel, the largest since 1990 (Roofing Contractor, April 2026). Quotes are being held open for shorter periods this year, so ask for the expiry date in writing.
How to judge the quote in your hand
- Match model numbers. Old and new versions of the same size differ by hundreds of dollars.
- Look for the gas line and the meter. Ask who calls the gas utility and who pays for a bigger meter.
- Look for the transfer switch size. It should match your service, 100, 200 or 400 amps.
- Ask for the load calculation. Sizing by square feet is a guess.
- Check permit and inspection are included. Nearly every town requires both.
Ways to pay less
- Cover the essentials, not the whole house. A smaller unit on key circuits runs $7,000 to $12,000.
- Place it close. Short runs to the meter and the panel cut trench, pipe and wire.
- Buy in a calm season. Prices and waits jump after every big storm.
- Consider a portable with an interlock. $1,500 to $3,500 installed covers a furnace, a fridge and lights if you can start it yourself.
What will this cost me?
Pick the job, your state's cost level and the last detail. The estimate updates as you change them.
An estimate built from published 2026 cost guides. It is not a quote. Get a written quote before work starts.
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Book a free 15 minute callNo pitch deck. We run your audit live on the call.Common questions
How much does a whole house generator cost?
$7,000 to $20,000 installed in 2026. Most 22 kW installs land at $10,000 to $14,000.
How much does a standby generator cost to install?
Installation adds $3,000 to $7,000 on top of the unit for the transfer switch, pad, permit, wiring and gas line.
How much is a 22 kW Generac generator?
The current 22 kW model with a transfer switch was listed at $7,369 on Sept 8, 2026. Installed, guides range from $8,500 to $18,000.
What size generator do I need for my house?
Most homes need 13 to 22 kW. Ask for a load calculation based on the circuits you want to run.
How much does it cost to maintain a standby generator?
$200 to $400 a year, plus fuel when it runs.