PowerOutage.us puts the national installed range at $7,000 to $15,000, covering the generator, labor, electrical equipment, fuel connections, and permits. Locally, Union County-based All City Electrical lists typical installed generator pricing of $10,000 to $17,000, including installation and permit fees. National cost guides break whole house generator cost into these parts:
| Cost component | Published planning range | Source |
| Standby generator unit | $2,000 to $7,500 | PowerOutage.us |
| Installation labor | $3,000 to $5,000 | PowerOutage.us |
| Automatic transfer switch installation | $600 to $2,500 | HomeGuide |
| Gas line installation | $15 to $50+ per linear foot | HomeGuide |
| Precast generator pad | $150 to $400 | HomeGuide |
| Permits and inspections | $100 to $500 nationally | PowerOutage.us |
Keep in mind these are all just general averages that don’t take your particular circumstances into consideration. It’s easier to install one in a house that already has a gas line and electrical panel compared to one that needs either of those things, and that’ll be reflected in the cost. For New Jersey homeowners, a professional install commonly falls around $10,000 to $17,000.
Whole House Generator Cost in New Jersey, Installed
A contractor’s bundled price may already include the transfer switch, fuel line, or excavation. Gas piping and trenching can overlap too, since the gas-line figure may include digging. Every quote should spell out what it includes in plain terms. Toss any that don’t without a second thought.
HomeGuide lists a 3- to 4-inch precast pad at $150 to $400. A poured concrete pad with site prep can cost considerably more. Both can be fair prices, but they are not pricing the same work.
Sizing Can Move Whole House Generator Cost by Thousands
Home standby generators are rated in kilowatts, or kW, with the most common models running roughly 10-26 kW. PowerOutage.us’s installed-price examples include a 14 kW Champion at $7,000 to $10,000 and a 22 kW Generac at $10,000 to $14,000. Again, ballpark ranges. A residential electrical load calculation can help you determine the size you need.
The electrician has to count the systems that may run together, such as heat, refrigeration, and well pumps. In a house with a basement sump pump, backup power is especially important because storms that cut power can also fill the pit. Central air can also influence the numbers due to its large inherent power demands.
Load Management Can Keep the Generator Smaller
Under Article 702 of the National Electrical Code, an automatic standby system must cover the connected load or use approved load management to limit which loads run. Load management can hold back a large air-conditioning compressor or EV charger while essential circuits keep running.
That lets the installer check whether a smaller generator can serve the house without overloading, which can lower the whole house generator cost. Two bids for the same property can differ because one includes load management and the other assumes more equipment will run at once. Verona, New Jersey, in particular, requires load management if the system uses an automatic transfer switch.
What Affects Whole House Generator Cost?
Some factors that can influence the ballpark ranges listed above include proximity, gas supply, and the electrical panel. When the generator is close to the gas meter and electrical panel, it requires less piping and wiring. That’s less installation work, which means lower installation cost. HomeGuide prices electrical wiring at about $6 to $8 per foot, on top of the gas line. Trench digging may be its own line, and it may not include lawn repair.
The Gas Meter May Need an Upgrade
A natural gas standby generator guzzles gargantuan amounts of fuel, much more than a clothes dryer. Have the gas utility check your service and meter before purchasing a generator to see if the existing infrastructure can handle the load.
If the utility has to change the meter or service, it controls that part of the schedule, not the contractor. Propane works where natural gas isn’t available, though the storage tank adds cost and placement rules and may need fire-code approval.
An Older Panel Can Add Electrical Work
A newer 200-amp panel may simplify the install, but its amperage does not set generator size by itself. An older 100-amp panel with limited capacity or outdated parts can be a different story. The electrician may need added service equipment, a panel change, or another approved setup for the transfer switch.
Before accepting an extra charge, ask which electrical panel upgrades the job needs and whether the generator estimate includes them. Just because the panel’s pulling a lot of weight doesn’t mean the entire home needs rewiring.
New Jersey Permits Add to Whole House Generator Cost
Towns review the wiring, fuel piping, placement, and any site work under their own rules, which vary from town to town. A single install can need separate electrical, plumbing, and zoning approvals, each with its own charge. That makes the national permit range in the table a starting point, not a quote.
Some towns may require a load calculation under National Electrical Code Article 220. Submitting one might also need a wiring diagram of the generator and transfer switch, plus equipment specs. A separate gas riser diagram shows the pipe material, length, size, and the generator’s Btu demand.
The gas piping test has to pass before the electrical inspection. That final electrical inspection includes a test run with the contractor present. Towns might also want a property survey showing the generator location. Placement rules and the maker’s clearances can rule out a preferred side-yard or backyard spot.
A propane or diesel install needs a fire permit there. Other towns write their own checklists, so Verona’s list is an example, not a statewide rule. That’s why a quote that lists permit fees but says nothing about submissions or inspections deserves another look.
Questions Before Buying a Standby Generator
Is there a tax credit for a whole house generator?
There is no general federal energy tax credit for a conventional natural gas or propane standby generator. The two federal home energy credits, the Energy Efficient Home Improvement Credit and the Residential Clean Energy Credit, have also ended. Under current law, neither covers new work after December 31, 2025.
A homeowner buying a generator mainly to power medical equipment may have a separate medical-expense question. Federal tax rules let equipment installed mainly for medical care count as a medical expense, reduced by any increase in the home’s value. A whole-house generator also serves the rest of the home and can add value. Only part of the cost may count, so a tax professional should review it.
How long does a standby generator last?
A properly installed and maintained standby generator can last roughly 15 to 30 years, according to HomeGuide, though hours and upkeep change that. Standby units run automatic exercise cycles to check that the engine starts, but those cycles do not replace routine maintenance. PowerOutage.us estimates about $300 to $600 a year for servicing and inspection.
Is a portable generator cheaper?
Yes, especially at the time of purchase. Portable generators cost much less than permanent standby systems, but they need manual setup, fuel storage, and safe outdoor use. They cannot run inside a house, garage, or enclosed porch because of carbon monoxide danger. Hooking a portable unit to house wiring through an approved inlet and interlock still takes an electrician.
Read the Installation Quote Before Paying a Deposit
A useful generator quote lists the model, kW rating, and transfer-switch equipment. It should also show how the installer chose the size and whether the bid includes load management. The scope needs to explain the electrical and fuel connections, how far each line runs, and whether the price includes trenching. Look for the pad type, grading, lawn repair, and any panel changes too.
A quote shouldn’t leave permit fees as an unexplained allowance. Ask which permits the price covers, who submits them, and who arranges inspections. If the gas utility may need to change the meter, the quote should say who coordinates that work and whether the schedule depends on it.
Two contractors can quote the same generator model and arrive at very different totals because one has priced those details and the other has left them unresolved. Getting those differences onto paper before the deposit gives a far more useful comparison than the generator’s price alone.
Sources
FirstEnergy, JCP&L Power Restoration Update, July 4, 2026
PowerOutage.us, Whole House Generator Cost Installed
HomeGuide, How Much Does a Whole House Generator Cost
Township of Verona, Permit Requirements for Standby Generators
