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New York Energy Resource Bureau
An independent homeowner guide to NY energy incentives
Source quality: Secondary

Suffolk County

County or city: Suffolk County, NY Utility territory: PSEG Long Island for electric (countywide); National Grid for natural gas across western and central Suffolk; portions of eastern Suffolk have no natural gas service and rely on propane, oil, or electric heat Verified: May 27, 2026 Source quality: Secondary

What programs apply here

Every Suffolk County homeowner has access to the same statewide programs as the rest of New York. Electric service is PSEG Long Island across the entire county. Gas coverage is the variable: National Grid serves most of the western and central towns, but the East End (parts of Riverhead, Southold, Southampton, East Hampton, Shelter Island) has limited or no natural-gas mains. That matters for which equipment rebates apply at your address. At a Suffolk address you can apply for:

  • NY-Sun: the state's upfront solar incentive.
  • NY-Sun Community Solar: subscription-based solar bill credits for renters and homeowners without suitable roofs.
  • NY State Solar Tax Credit: the 25% state income tax credit on residential solar.
  • NY State Geothermal Credit: the 25% state credit for ground-source heat pump installs.
  • NYS Clean Heat: heat pump rebates, delivered on Long Island through PSEG LI.
  • Comfort Home: flat per-measure incentives for insulation and air sealing.
  • EmPower+: no-cost or low-cost upgrades for income-eligible households, and the intake path for the federal HEAR rebate.
  • PSEG Long Island Rebates: heat pump water heaters, smart thermostats, geothermal, and a free home energy assessment.
  • National Grid Rebates: the gas-side equipment rebates for the National Grid Long Island footprint (western and central Suffolk).
  • Solar for All: income-qualified community solar with no enrollment fee.

What stacks at this address

Suffolk's geography creates two distinct stack patterns: the gas-served western and central towns, and the gas-light East End.

  • Western/central Suffolk, gas-served (Babylon, Islip, Smithtown, Brookhaven, Huntington). Comfort Home envelope work followed by either a National Grid gas equipment rebate (if staying on gas) or a Clean Heat heat pump rebate through PSEG LI (if electrifying). The two heating-fuel paths are mutually exclusive for a given system, but the envelope work feeds either one. Heat pump water heater rebates through PSEG LI apply on both paths.
  • East End, gas-light (Southold, Shelter Island, parts of Southampton and East Hampton). If your house runs on oil, propane, or electric resistance, the case for an air-source or ground-source heat pump is stronger because there is no incumbent gas line to defend. Pair the PSEG Long Island Rebates heat pump or geothermal tier with the NYS Clean Heat rebate (which on Long Island is delivered through PSEG LI) and the NY State Geothermal Credit for ground-source.
  • Geothermal on East End properties. Larger lot sizes on the South Fork and North Fork make vertical-loop geothermal more practical than in dense Nassau or western Suffolk neighborhoods. Well-water siting and septic setbacks affect loop-field placement; have the loop designer pull the site survey before pricing.
  • Solar: NY-Sun + state solar credit. Both apply on every Suffolk address. NY-Sun is netted against the contract; the state credit is claimed on the next year's return on the post-rebate cost.
  • Income-qualified entry. Start with EmPower+. The certification qualifies a household for the higher PSEG LI geothermal tier and for Solar for All community solar.

County or city programs unique to here

Suffolk County government does not administer a county-level residential cash rebate for energy upgrades. The distinctive layer here is town-level. Suffolk has more municipal energy programming than almost any other New York county outside the city.

  • Long Island Green Homes. Originated at the Town of Babylon in 2008 as the first municipal residential energy program of its kind in the country. The program later expanded to operate as a regional intake across Long Island. For most Suffolk homeowners, this is the first call.
  • Town of Babylon. Babylon residents have the longest-running municipal track. The town routes residents through the regional Long Island Green Homes intake.
  • East End town sustainability offices. Southampton, East Hampton, and Shelter Island have funded local Solarize cycles, climate-resilience planning, and (periodically) direct-install programs.
  • Town of Brookhaven. The largest Suffolk town by area. Runs sustainability initiatives and has participated in Solarize cycles coordinated with Long Island Green Homes.
  • Town of Riverhead and Town of Southold. Sustainability committees with intermittent Solarize participation. Programs come and go on town fiscal cycles; check before assuming a cycle is open.
  • Suffolk County Office of Climate. Houses county-level planning work, including the Suffolk County Climate Action Plan. Not a residential rebate funder.

Who to call locally

  • Long Island Green Homes: longislandgreenhomes.org. Free intake for energy audits, weatherization, heat pumps, and connecting to a vetted contractor. Babylon is the program's home town; the intake covers the full Island.
  • PSEG Long Island residential customer service: 1-800-490-0025. Rebate questions, the home energy assessment, and Smart Savers enrollment. Geothermal goes through a participating Geothermal Partner from the PSEG LI contractor finder.
  • National Grid residential customer service (Long Island gas): 1-800-930-5003. Gas equipment rebates and ConnectedSolutions for gas-served Suffolk addresses. East End homeowners without a gas line should skip this and go to the electric heat pump path.
  • Suffolk County Office of Climate / Department of Economic Development & Planning: main county switchboard at 631-853-4000. Useful for county climate planning context.

Climate Smart Communities status

Suffolk County is registered with the New York State Climate Smart Communities program. A number of Suffolk municipalities carry certification: the Town of Babylon (an early certified community, tied to its long Green Homes history), the Town of Southampton, the Town of East Hampton, the Town of Brookhaven, and the Village of Sag Harbor among others. Certification level changes; confirm a specific town's current bronze, silver, or gold status against the Climate Smart Communities certified-communities list before citing it in dated material.

Important local dates

  • Solarize campaign windows on the East End and across Suffolk are typically open for a few months at a time and close before installations begin. South Fork and North Fork campaigns sometimes align with shoulder-season scheduling to keep installers off summer-traffic roads.
  • PSEG Long Island runs on annual program budgets. Geothermal amounts were updated for the 2026 program year. File the rebate paperwork as soon as the install is complete; mid-year budget exhaustion has occurred in past Long Island rebate cycles.
  • East End building-department review for solar, batteries, and ground-source loop fields can run longer than in western Suffolk during the summer season. Schedule submittal in shoulder months when possible.
  • The federal 25C heat pump tax credit follows the calendar year. Equipment placed in service by December 31 counts for that tax year.

Source

NYSERB.com is an independent research site. It is not affiliated with Suffolk County, PSEG Long Island, National Grid, Long Island Green Homes, the State of New York, or any utility. Verify all program details and incentive amounts directly with the relevant program administrator before making any financial decision.

Verified against www.psegliny.com, www.longislandgreenhomes.org, www.suffolkcountyny.gov on May 27, 2026.

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