How Much Does Generator Installation Cost in Portland, ME?
A 22 kW whole-house generator costs $9,000 – $14,500 installed in Portland (close to the Maine average — Portland has the most installers in the state). The primary outage risk is nor'easters and ice storms. Central Maine Power (CMP) serves the area with approximately 24 hours of outages per year.
Generator Installation Cost in Portland
| Setup | Size | Cost in Portland |
|---|---|---|
| Essential circuits | 10-16 kW | $6,000 – $10,000 |
| Whole house | 20-22 kW | $9,000 – $14,500 |
| Large home | 24-48 kW | $14,000 – $22,000 |
Portland is Maine's largest city and one of the few areas in the state with natural gas infrastructure. The city faces relentless nor'easters and coastal storms that regularly knock out power.
Not sure what size you need? Use our sizing guide or interactive calculator for a personalized recommendation. For the full national breakdown, see our installation cost guide.
Portland-Specific Installation Requirements
Local Code — Cumberland County
Cumberland County follows the MUBEC. Standard permits. Portland is one of the few Maine cities with natural gas.
Permits
Permit cost: $50 – $175. Timeline: 1-2 weeks. Your installer handles filing and inspection.
Preferred Fuel: Natural Gas
Summit Natural Gas serves the Portland area — one of the few parts of Maine with natural gas.
See statewide Maine costs and requirements for comparison.
Power Outage Risk in Portland
3
Outages/year
8h
Avg duration
Nor'easters and ice storms
Primary risk
Central Maine Power (CMP)
Local utility
The December 2023 nor'easter left Portland and surrounding communities without power for several days.
How Much Does a Home Generator Cost?
Get an instant estimate based on your home size and power needs.
Recommended size
22 kW
Estimated cost
$7,700 – $12,100
Includes equipment, installation, transfer switch, and permits
As low as $83/month with approved financing
Prices vary by location. Enter your ZIP code for local estimates.
FAQ — Generator Installation in Portland
How much does a generator cost in Portland?
A 22 kW generator costs $9,000-$14,500 installed. Portland has the best installer availability in Maine.
Can I use natural gas in Portland?
Yes — Portland is one of the few Maine cities with natural gas via Summit Natural Gas. This is a significant advantage over propane.
How bad are nor'easters?
Portland gets hit by 5-10 significant nor'easters per year. Multi-day outages are common, especially in surrounding areas with overhead lines.
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