How Much Does a Standby Generator Cost Installed in 2026?

If you’ve been researching home standby generators, you’ve probably noticed that prices vary wildly — one installer quotes $5,000, another says $15,000, and the manufacturer website shows a unit price that seems completely disconnected from what contractors are actually charging. So what does a standby generator actually cost installed in 2026?

This guide breaks down every cost component, what drives the range, and what you should realistically expect to pay based on your home size and situation.

The Short Answer: What Does a Standby Generator Cost Installed?

For most homeowners, a whole-home standby generator costs between $5,000 and $15,000 fully installed. Here’s a quick breakdown by home size:

• Small home / essential circuits only: $3,500–$6,000
• Medium home, whole-home coverage (1,200–2,500 sq ft): $6,000–$11,000
• Large home (2,500+ sq ft): $10,000–$18,000+

These ranges assume natural gas fuel with an existing gas line nearby. Propane installations, new gas line runs, panel upgrades, and other complications can push costs higher.

What’s Included in the Installed Cost?

The total cost of a standby generator installation has several components. Understanding each one helps you evaluate quotes and avoid surprises.

1. The Generator Unit Itself

Hardware costs vary by brand and size:

• 7–10 kW (essential circuits): $1,800–$3,500
• 14–16 kW (medium home): $2,800–$5,000
• 20–22 kW (large home): $4,000–$7,500
• 24–26 kW (very large home): $5,500–$10,000+

Premium brands like Kohler and Cummins run 15–25% more than Generac for comparable output. Budget brands like Champion run 10–20% less.

2. Automatic Transfer Switch (ATS)

The transfer switch is what detects a power outage and automatically switches your home to generator power. It’s not optional — without it you’d have to manually connect the generator every time.

• Whole-home transfer switch: $500–$1,500 for the unit
• Essential circuit transfer switch (load shedding): $300–$800

Most modern standby generators come bundled with a transfer switch, but verify this when getting quotes — some contractors price it separately.

3. Electrical Work and Labor

A licensed electrician must connect the transfer switch to your main electrical panel, run wiring to the generator, and ensure everything meets local electrical codes.

• Standard installation (panel in good condition, short run): $500–$1,200
• Complex installation (long wire run, difficult access): $1,200–$2,500

4. Gas Line Work

If you have natural gas and the meter is near where the generator will be installed, this cost is minimal. If you need a new line run or an extension, costs increase significantly.

• Short gas line connection (under 20 feet): $150–$400
• Long gas line run (20–100 feet): $400–$1,500
• New gas service (no existing gas): $1,000–$3,000+ depending on distance from street

For propane: you’ll also need a propane tank — either purchased ($800–$2,500) or rented through a propane supplier (typically $0–$200/year rental with a fuel contract).

5. Concrete Pad or Gravel Base

Standby generators must be installed on a stable, level surface. Most installations use either a pre-formed concrete pad or a poured concrete slab.

• Pre-formed concrete pad: $150–$300 (some generators include this)
• Poured concrete slab: $300–$700
• Gravel base (some municipalities allow this): $100–$250

6. Permits and Inspections

Most municipalities require a permit for standby generator installation. Reputable installers pull permits automatically — if a contractor says permits aren’t necessary, that’s a red flag.

• Electrical permit: $75–$300
• Gas permit: $50–$200
• Total permits: $100–$500 depending on location

7. Optional: Panel Upgrade

If your home has an older 100-amp panel, you may need to upgrade to 200 amps to properly support a whole-home generator. This adds significant cost but is often worth doing regardless.

• Panel upgrade (100A to 200A): $1,500–$4,000

Cost by Generator Brand

Here’s a realistic installed cost range for the most popular brands for a medium-sized home (14–22 kW):

• Generac Guardian: $6,000–$11,000 installed
• Kohler Home Standby: $8,000–$14,000 installed
• Briggs & Stratton: $5,500–$10,000 installed
• Champion: $4,500–$8,500 installed
• Cummins QuietConnect: $7,000–$13,000 installed

What Drives the Cost Higher?

Several factors can push your installation cost toward the high end of the range or beyond:

• Geographic location: Labor costs in California, New York, and New England are significantly higher than the national average
• No existing gas line: Converting from all-electric or running a new gas line adds $1,000–$3,000
• Older electrical panel: Panel upgrades add $1,500–$4,000
• Remote generator placement: Long wire runs or difficult access adds labor time
• Premium brands: Kohler and Cummins carry a 15–30% premium over Generac
• High demand periods: After major storms, installer backlogs drive up prices and wait times

Annual Maintenance Costs

Standby generators require regular maintenance to stay reliable. Budget for:

• Annual service plan: $150–$300/year through your dealer or installer
• Oil changes: Every 200 hours of run time or annually — $50–$100 DIY, $100–$200 with a technician
• Spark plugs, air filter, coolant check: Typically included in annual service plan
• Fuel (natural gas weekly exercise cycle): Minimal — a few dollars per month at most

Total annual maintenance cost: $200–$500/year

Is a Standby Generator Worth the Cost?

For most homeowners in outage-prone areas, yes — the math works out. Here’s how:

• The average power outage costs homeowners $150–$500 in spoiled food, hotel stays, and disruption
• Extended outages (3+ days) can cost $1,000–$5,000 in losses
• A properly installed generator adds $5,000–$10,000 to home resale value according to multiple real estate studies
• For anyone who works from home, the ROI is immediate — one prevented work disruption can cover years of maintenance costs

How to Get the Best Price

• Get at least three quotes — prices vary 20–30% between contractors for the same job
• Buy in the off-season — spring and fall installations are typically cheaper than post-storm summer rush periods
• Ask about financing — most major brands and many installers offer 0% financing for 12–18 months
• Bundle with other electrical work — if you’re already planning a panel upgrade or other electrical project, bundling can reduce overall labor costs
• Check for utility rebates — some utilities offer rebates for standby generator installation, particularly in rural areas with frequent outages

The Bottom Line

A whole-home standby generator is a significant investment — but for most homeowners in areas with regular outages, it’s one that pays for itself in reliability, peace of mind, and home value. Most medium-sized homes will land in the $6,000–$11,000 range for a quality installed system.

The key to getting the best value is understanding what you’re paying for, getting multiple quotes from licensed installers, and choosing a brand with a strong local service network.

Ready to Take the Next Step?

GeneratorAdvice.com publishes in-depth guides on every aspect of home generator selection, sizing, installation, and maintenance. Use our resources to get educated before you start talking to contractors — an informed buyer always gets a better deal.