How much does a boiler replacement cost on Long Island?
Prices last checked
A boiler replacement job on Long Island (Nassau and Suffolk counties) is priced here at $4,500 to $12,000 for gas boiler, standard efficiency (non-condensing), 80k-150k BTU, installed and before rebates. We have no regional factor for this job, so that is our New York and New Jersey band, not a figure for Long Island alone.
How is the home heated today?
Boiler replacement cost on Long Island
| What is installed | Low | High | Published prices behind it |
|---|---|---|---|
| Gas boiler, standard efficiency (non-condensing), 80k-150k BTU | $4,500 | $12,000 | 7 |
| Gas boiler, high-efficiency condensing (95%+ AFUE) | $5,000 | $16,000 | 4 |
| Oil-to-gas boiler conversion (boiler, gas connection, tank removal) | $10,000 | $25,000 | 2 |
New York and New Jersey band, installed, before rebates; not adjusted for Long Island. Prices last checked October 30, 2026. Ranges, not quotes.
Published prices read for NY suburbs
| Source | Type | What was priced | Range | Read |
|---|---|---|---|---|
| AskDoss, Furnace and AC Installation Cost in New York in 2026 | cost guide | Boiler replacement, Long Island | $5,500 to $11,000 | 2026-10-30 |
| Trusted Local Contractors, HVAC Work Cost in Westchester County (2026 Guide) | cost guide | Gas boiler replacement, Westchester County | $5,000 to $12,000 | 2026-10-30 |
| AskDoss, Furnace and AC Installation Cost in New York in 2026 | cost guide | Hot water boiler, New York statewide | $4,500 to $10,000 | 2026-10-30 |
| LatestCost, Oil to Gas Conversion Cost on Long Island 2026 | cost guide | Oil-to-gas conversion, complete, Nassau or Suffolk home | $10,000 to $25,000 | 2026-10-30 |
"Cost guide" rows come from estimator or affiliate sites, not from an installer's own price page.
Rebates
No downstate New York rebate for this gas or oil equipment was confirmed for PSEG Long Island customers. Treat "open" as listed and not publicly paused, and confirm with the program or your installer before counting on a rebate.
Towns covered
Hempstead, Garden City, Levittown, Freeport, Long Beach, Great Neck, Massapequa, Oyster Bay, Glen Cove, Huntington, Islip, Brookhaven, Babylon, Smithtown, Riverhead, Southampton, East Hampton, Patchogue.
County data pages
- Nassau County PSEG Long Island is the electric company for Nassau County. Nassau County data page
- Suffolk County PSEG Long Island is the electric company for Suffolk County. Suffolk County data page
Common questions
How much does a boiler replacement cost on Long Island?
Gas boiler, standard efficiency (non-condensing), 80k-150k BTU runs $4,500 to $12,000, installed and before rebates. This is our New York and New Jersey band, not a Long Island-only figure. It is a range built from published prices, not a quote.
Is there a rebate for a new boiler replacement on Long Island?
No downstate New York rebate for this gas or oil equipment was confirmed for PSEG Long Island customers. Treat "open" as listed and not publicly paused, and confirm with the program or your installer before counting on a rebate.
How current is this page?
Prices were last checked October 30, 2026.
The HVAC Index is an information and matching service, not a contractor. These are ranges, not quotes; an installer sets the price after seeing your home. Read our methodology and how we make money.