Generator Installation Cost
What it costs to install a generator — the labor, transfer switch, pad, electrical and gas work behind the installation figure, plus how complexity changes the price.
Prices vary by location. Verify with local suppliers.
How much does generator installation cost?
Installing a whole-house standby generator typically costs $3,000–$5,000 in labor and materials, on top of the unit — covering the pad, the automatic transfer switch, electrical wiring, the gas hookup and commissioning. A portable-generator interlock or manual transfer switch is cheaper at $400–$1,500 installed. The estimator above rolls installation into the all-in price so you can see the whole number.
What installation covers
- Pad & mounting — a level composite or concrete pad for the unit.
- Transfer switch — an automatic transfer switch wired into your main panel.
- Electrical — conduit and the panel connection by a licensed electrician.
- Fuel — natural gas or propane connected by a licensed gas fitter.
- Permit & inspection — pulled and scheduled by your installer.
What makes it cost more
The biggest swing is the distance from the pad to the electrical panel and the gas meter — a long run or trenching adds labor and materials. A gas line that needs upsizing, an electrical panel upgrade, difficult site access, and higher local permit fees all push it up. The estimator’s complexity setting lets you model a simple, average or difficult install.
Who installs a generator?
A licensed electrician handles the transfer switch and panel connection; for gas or propane, a licensed gas fitter connects the fuel. Many dealers offer a turnkey install with both trades and pull the permit — a whole-house standby is permitted and inspected, not a DIY job. Size it first with the sizing calculator, and see the full whole house generator cost and transfer switch detail.
Estimates only; regional pricing, site access and permit fees vary. A permanent install must be done by licensed trades with a permit and inspection.
Frequently asked questions
How much does generator installation cost?
Installing a whole-house standby generator typically costs $3,000–$5,000 in labor and materials, on top of the unit — covering the pad, automatic transfer switch wiring, electrical, gas hookup and commissioning. A portable-generator interlock or manual transfer switch is cheaper at $400–$1,500 installed. A long run to the panel or gas meter, trenching, or a panel upgrade pushes standby installation higher.
Who installs a home generator?
A licensed electrician installs the electrical side — the transfer switch and panel connection — and, for natural gas or propane, a licensed plumber or gas fitter connects the fuel. Many generator dealers provide a turnkey install with both trades and pull the permit. A whole-house standby must be permitted and inspected; it’s not a DIY job.
Does generator installation need a permit?
Yes. A permanently installed standby generator requires an electrical permit (and often a gas/mechanical permit), plus an inspection, in essentially all US jurisdictions. Permit fees usually run $100–$500. A reputable installer pulls the permit and schedules the inspection as part of the job — skipping it risks fines, insurance problems and an unsafe install.