2025 Cost Breakdown by Type
Prices reflect installed costs from licensed NJ contractors in Middlesex, Monmouth, and Ocean County. Material costs and contractor availability affect final pricing.
| Service / Item | Low | Avg (NJ) | High |
|---|---|---|---|
| 10kW generator (essential circuits) | $7,000 | $9,500 | $12,000 |
| 16kW generator (most homes) | $9,000 | $12,000 | $15,000 |
| 22kW generator (whole home) | $12,000 | $16,000 | $22,000 |
| Automatic transfer switch | $1,000 | $1,800 | $3,000 |
| Natural gas line extension | $800 | $1,800 | $4,000 |
What Affects the Cost in NJ?
These are the key factors that will determine your actual project cost in Central NJ.
Generator Size (kW)
Size is determined by your home's electrical load. A 16kW unit covers most NJ homes including central AC. Larger homes or homes with electric heating need 22kW+.
Fuel Type
Natural gas is most convenient (no refueling). Propane requires a tank. NJ homes with existing gas service (PSE&G) are best positioned for natural gas generators.
Electrical Panel Work
The transfer switch ties into your main panel. Older panels sometimes need upgrades first — adding $1,500–$3,500 to the project.
Gas Line Work
If the existing gas line doesn't have adequate pressure or capacity, a new line or upsizing is required, adding $800–$4,000 depending on distance.
Permits & Inspection
NJ requires electrical and gas permits for generator installation. Budget $400–$800. Installation also requires a setback from windows, doors, and property lines.
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