How Much Does It Cost to Install a Whole-House Generator?
A whole-house standby generator typically costs $5,000 to $15,000 installed, including the unit, transfer switch, and labor. Smaller units that cover essentials run less; large units powering an entire home, or installs needing electrical and fuel work, run more.
A standby generator switches on automatically when the power goes out, running on natural gas or propane. The total cost depends on the generator's size and what's involved in connecting it. Here's the breakdown.
Typical Cost by Generator Size
| Coverage | Typical Installed Cost |
|---|---|
| Essentials only (small standby) | $5,000 – $8,000 |
| Most of the home (mid-size) | $8,000 – $12,000 |
| Entire large home (high capacity) | $12,000 – $15,000+ |
| Added fuel line or panel work | Varies |
Typical U.S. estimates; cost varies by generator size, fuel type, site work, and permits. Your electrician provides a firm quote.
What's Included in the Cost
- The generator unit — the biggest single cost, sized to your needs.
- Automatic transfer switch — detects outages and switches power over.
- Electrical hookup — connecting to your panel safely and to code.
- Concrete pad — a stable base for the unit.
- Fuel connection — tying into natural gas or propane.
- Permits and inspection — required in most areas.
Why hire a pro: a standby generator involves high-voltage electrical work, a transfer switch, and often gas lines. It must be installed to code by a licensed professional for safety and to keep your warranty valid.
Considering a Standby Generator?
The Neighborhood Electrician connects you with a licensed electrician who can size, install, and quote your generator.
Frequently Asked Questions
What size generator do I need for my house?
It depends on what you want to power. Essentials-only setups use smaller units; whole-home coverage needs a larger one. An electrician calculates the right size based on your loads.
Does a whole-house generator add home value?
Often yes, especially in areas prone to outages. Buyers value the security of automatic backup power, and it can be a selling point.
How long does installation take?
Most installs take one to a few days, depending on electrical and fuel work and any permitting. Your electrician confirms the timeline when quoting.
Connecting U.S. homeowners with licensed, insured, and vetted electricians since 2015 — from emergency repairs to panel upgrades.
The Neighborhood Electrician is a referral service that connects homeowners with independent, licensed electrical contractors. We do not perform electrical work directly.