How Much Does Generator Installation Cost in Long Island, NY?
A 22 kW whole-house generator costs $11,000 – $18,000 installed in Long Island (close to the NY state average for suburban areas — lower than NYC but higher than Upstate due to Long Island's labor rates and permitting). The primary outage risk is hurricanes and nor'easters. PSEG Long Island (LIPA) serves the area with approximately 20 hours of outages per year.
Generator Installation Cost in Long Island
| Setup | Size | Cost in Long Island |
|---|---|---|
| Essential circuits | 10-16 kW | $7,500 – $12,000 |
| Whole house | 20-22 kW | $11,000 – $18,000 |
| Large home | 24-48 kW | $17,000 – $28,000 |
Long Island is one of the highest-demand generator markets in the Northeast. Sandy's devastation in 2012 created a permanent shift — homeowners who went 2-3 weeks without power vowed never again. PSEG Long Island serves the area (under contract with LIPA), and the suburban layout means most homes have space for a standby unit. South Shore communities remain especially vulnerable to hurricane surge and flooding.
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.
Long Island-Specific Installation Requirements
Local Code — Nassau / Suffolk County
Nassau and Suffolk counties follow the NYS Uniform Code. PSEG Long Island requires interconnection notification. South Shore flood zone properties (many post-Sandy remaps) require elevated generator mounting. Wind-speed design requirements apply in coastal zones.
Permits
Permit cost: $150 – $400. Timeline: 2-4 weeks. Your installer handles filing and inspection.
Preferred Fuel: Natural Gas
National Grid provides gas service across most of Long Island. Some areas have gas moratoriums — propane is the alternative.
See statewide New York costs and requirements for comparison.
Power Outage Risk in Long Island
2.5
Outages/year
8h
Avg duration
Hurricanes and nor'easters
Primary risk
PSEG Long Island (LIPA)
Local utility
Superstorm Sandy (2012) devastated Long Island's South Shore — over 1 million LIPA customers lost power, with restoration taking 2-3 weeks in hardest-hit areas. Tropical Storm Isaias (2020) caused week-long outages across Suffolk County.
Find Generator Installers in Long Island
HomeGen connects you with certified installers in Long Island and surrounding areas including New York City, Westchester and Buffalo. Get 2-3 quotes to compare pricing — installation costs vary by up to $3,000 between contractors in the same city.
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 Long Island
How much does a 22 kW generator cost on Long Island?
A 22 kW generator costs $11,000-$18,000 installed on Long Island. This is close to the NY state average for suburban areas — less than NYC, more than Upstate.
Is PSEG Long Island reliable?
PSEG has improved since taking over from LIPA's in-house operations, but Long Island's exposure to hurricanes, nor'easters, and coastal storms means outages remain common. Tropical Storm Isaias (2020) caused week-long outages across Suffolk County.
Do I need flood-rated mounting on Long Island's South Shore?
If your property was remapped into a FEMA flood zone after Sandy (2012), likely yes. This includes large parts of the South Shore from Long Beach to the Hamptons. Elevated mounting adds $300-$600.
Ready to Get Generator Quotes in Long Island?
Compare prices from certified local installers in Nassau / Suffolk County. Free and no-obligation.
Get Your Free Quote Now