How Much Does It Cost to Install a Home Generator in 2026?
Last updated: April 2026
The average cost to install a home standby generator in 2026 is $8,000 to $15,000, including equipment, labor, transfer switch, and permits. A standard 22 kW unit costs about $12,000. The three biggest price factors are generator size (kW), your state (labor rates and permits), and the brand you choose.
Generator installation isn't cheap. But it's one of those purchases where knowing the real numbers ahead of time saves you from overpaying or buying the wrong size. This guide breaks down every cost component so you can walk into a quote meeting and know exactly what's fair.
Not sure what size you need yet? Start with our generator sizing guide first. Size drives cost more than anything else.
What's the Average Cost by Generator Size?
Size is the single biggest cost driver. A 10 kW unit for essential circuits costs half as much as a 22 kW whole-house system. Here's the full breakdown for 2026:
| Size | Equipment | Installation | Total Installed |
|---|---|---|---|
| 10 kW | $2,500 – $3,800 | $3,000 – $5,000 | $5,500 – $8,800 |
| 14 kW | $3,200 – $4,500 | $3,200 – $5,200 | $6,400 – $9,700 |
| 16 kW | $3,800 – $5,200 | $3,300 – $5,500 | $7,100 – $10,700 |
| 20 kW | $4,500 – $6,000 | $3,500 – $5,800 | $8,000 – $11,800 |
| 22 kW | $5,000 – $7,000 | $3,500 – $6,000 | $8,500 – $13,000 |
| 24 kW | $5,500 – $8,000 | $3,800 – $6,200 | $9,300 – $14,200 |
| 26 kW | $6,500 – $10,000 | $4,000 – $6,500 | $10,500 – $16,500 |
| 30 kW* | $9,000 – $13,000 | $4,500 – $7,500 | $13,500 – $20,500 |
| 36 kW* | $11,000 – $16,000 | $5,000 – $8,000 | $16,000 – $24,000 |
| 48 kW* | $14,000 – $22,000 | $5,500 – $9,000 | $19,500 – $31,000 |
* Liquid-cooled units. All others are air-cooled.
The sweet spot for most homeowners is the 20-22 kW range. That covers central AC, all major appliances, and a home office for a typical 2,000 sq ft house. Below 16 kW and you're giving up AC. Above 26 kW and you're in commercial territory with liquid-cooled systems that cost 50-70% more.
Use our detailed calculator to get a personalized estimate based on your exact appliances.
What's Included in the Installation Cost?
When an installer quotes you $12,000 for a 22 kW generator, here's where that money actually goes:
Generator unit
$5,000 – $7,000
The generator itself. This is the single biggest line item. Prices vary by brand, size, and whether it's air-cooled or liquid-cooled.
Automatic Transfer Switch (ATS)
$800 – $2,000
Detects when utility power drops and switches your home to generator power in seconds. This is required — not optional. A 200-amp ATS is standard for most homes.
Installation labor
$1,500 – $3,000
Electrical wiring from the generator to your panel, ATS installation, startup and testing. Expect 1-2 days of on-site work by a licensed electrician.
Concrete pad
$500 – $1,200
The generator sits on a level concrete or composite pad. Some installers pour a new pad; others use pre-fab pads that cost less.
Gas line connection
$500 – $1,500
Running a dedicated gas line from your meter to the generator. Distance matters. If the generator is 50+ feet from the gas meter, this gets expensive.
Permits and inspection
$50 – $500
Electrical permit is required in virtually every US municipality. Some areas also require a plumbing/gas permit. Your installer usually handles this.
According to the U.S. Census Bureau's construction spending data, residential electrical work costs have risen 12-15% since 2022, driven by labor shortages and material costs. That tracks with what we're seeing in generator installation quotes across the country.
How Much Does Generator Installation Cost in My State?
Where you live changes the price dramatically. A 22 kW Generac that costs $11,000 installed in Tennessee might run $18,000+ in California. Here's why, and what to expect in each state:
| State | 22 kW Installed | Cost Factor | Why |
|---|---|---|---|
| Florida | $9,000 – $14,000 | Average | High demand, competitive market, hurricane-driven volume |
| Texas | $8,500 – $13,500 | Below avg | Lower labor costs, strong installer competition |
| Louisiana | $8,000 – $12,500 | Below avg | Lower cost of living, high outage frequency drives volume |
| Georgia | $8,500 – $13,500 | Below avg | Moderate labor, growing market |
| California | $13,000 – $22,000 | 55% above | Seismic bracing required, strict permits, high labor |
| New York | $11,000 – $18,000 | 35% above | High labor rates, complex permitting in tri-state area |
| Michigan | $8,500 – $13,000 | Below avg | Midwest labor rates, straightforward permitting |
California deserves special mention. The state requires seismic bracing for outdoor equipment, Title 24 energy compliance documentation, and local fire department setback approvals in wildfire zones. HomeAdvisor reports that California generator installations cost 50-70% more than the national average, and our data confirms that range.
For Florida and Texas, the good news is competition. These states have so many installers that prices stay reasonable even during peak hurricane season. Just don't wait until a storm is in the forecast to start shopping. Lead times double overnight.
See all pricing by state on our state-by-state directory.
Does the Brand Affect the Installation Price?
Yes, but less than you'd think. Installation labor is roughly the same regardless of brand. The price difference is almost entirely in the unit itself. Here's how the major brands stack up for a 20-22 kW unit:
Generac Guardian
$5,000 – $6,500
Market leader (~75% share). Best dealer network, fastest parts availability. The Honda Civic of generators: reliable, well-priced, everywhere.
Generac Protector (liquid-cooled)
$9,000 – $16,000
For large homes (30+ kW). Quieter and longer-lasting than air-cooled, but significantly more expensive. Only needed above 26 kW.
Kohler
$5,800 – $8,000
Premium build quality, slightly quieter operation. Smaller dealer network than Generac. Popular in the Northeast and with homeowners who want the "premium" option.
Briggs & Stratton
$4,200 – $5,500
Budget-friendly option. Solid reliability but fewer features. The company went through bankruptcy in 2020 and was acquired, so parts availability can be spotty in some areas.
Champion
$3,800 – $5,000
Lowest price point for standby generators. Popular for essential-circuits-only setups. Limited dealer/service network compared to Generac and Kohler.
Consumer Reports rates Generac and Kohler as the top two standby generator brands for reliability and owner satisfaction. For a detailed head-to-head, read our Generac vs Kohler comparison.
How Can I Reduce My Generator Installation Cost?
You're not going to negotiate the price of the generator unit. That's set by the manufacturer. But there's real money to save on the installation side:
Get 3 quotes, minimum. Installation labor varies wildly between companies. We've seen $2,000 differences on the same job in the same city. The NFPA recommends using only licensed electrical contractors for generator installations, but within that pool, prices vary a lot. Getting multiple bids is the single best way to save money.
Place the generator close to your gas meter and electrical panel. Every extra foot of gas line and electrical conduit adds cost. If you can keep the generator within 20 feet of both, you'll save $500-$1,000 on the install.
Consider a load management system. Instead of buying a 26 kW generator to cover everything, a smart transfer switch with load shedding lets you use a smaller (cheaper) unit by cycling non-critical loads. Your AC and electric dryer never run at the exact same time, but you probably won't notice.
Buy off-season. Generator prices don't change much seasonally, but installer availability does. In Florida and the Gulf Coast, fall and winter are the slow months. Installers are more willing to compete on price when they're not booked solid.
Check for utility rebates. Some utility companies offer demand-response incentives for standby generators. The Department of Energy's Energy Saver program lists federal and state programs. It's not a huge discount, but $200-$500 off is $200-$500 off.
Finance it. Most major installer networks offer 60-120 month financing. A $12,000 generator at 120 months is about $100/month. Not free, but way more manageable than writing a $12K check.
Estimate Your Cost with Our Free Calculator
Plug in your home size, state, and fuel type to get a personalized estimate. For an appliance-by-appliance breakdown, use our detailed calculator.
How Much Does a Home Generator Cost?
Get an instant estimate based on your home size and power needs.
Recommended size
22 kW
Estimated cost
$7,700 – $12,100
Includes equipment, installation, transfer switch, and permits
As low as $83/month with approved financing
Prices vary by location. Enter your ZIP code for local estimates.
Frequently Asked Questions
How much does a whole-house generator cost fully installed?
A whole-house standby generator typically costs $8,000 to $15,000 fully installed for a standard 20-22 kW unit. This includes the generator, automatic transfer switch, concrete pad, gas line connection, electrical work, and permits. Larger homes or high-cost states like California can push the total above $20,000.
Is it cheaper to install a generator yourself?
No. Standby generator installation requires a licensed electrician for the transfer switch wiring and, in most states, a plumber or gas fitter for the fuel connection. DIY installation voids most manufacturer warranties and violates building codes in virtually every US jurisdiction.
How much does it cost to run a home generator per day?
Running costs depend on fuel type and load. A 22 kW generator on natural gas costs roughly $30-$50 per day at half load. Propane costs about $40-$60 per day. Diesel is the most expensive at $50-$70 per day. Most outages last 8-24 hours, so a single event typically costs $20-$50 in fuel.
Does a home generator increase my property value?
Yes. According to Remodeling Magazine's Cost vs. Value report, a standby generator recoups roughly 50-75% of its cost at resale. In hurricane-prone states like Florida and Texas, that number can be higher because buyers actively look for backup power.
How long does generator installation take?
The on-site installation takes 1-2 days. But the full timeline from contract to power-on is usually 2-6 weeks, depending on permit approval times in your area and equipment availability. During hurricane season, lead times can stretch to 8-12 weeks.
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