How much does central AC cost on Long Island?
Prices last checked
A central AC job on Long Island (Nassau and Suffolk counties) is priced here at $4,500 to $9,000 for central AC, 2 to 2.5 ton, 14-16 SEER2, ducts existing, 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?
Central AC cost on Long Island
| What is installed | Low | High | Published prices behind it |
|---|---|---|---|
| Central AC, 2 to 2.5 ton, 14-16 SEER2, ducts existing | $4,500 | $9,000 | 6 |
| Central AC, 3 to 4 ton, 14-16 SEER2, ducts existing | $5,500 | $12,000 | 9 |
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 | Central AC (split system), New York statewide | $5,000 to $8,000 | 2026-10-30 |
| CentralACInstallCost.com, Central AC cost in New York | cost guide | 3-ton central AC, Long Island | $5,800 to $8,000 | 2026-10-30 |
| CentralACInstallCost.com, Central AC cost in New York | cost guide | 3-ton central AC, Westchester and Rockland | $6,200 to $8,500 | 2026-10-30 |
| Trusted Local Contractors, HVAC Work Cost in Westchester County (2026 Guide) | cost guide | Central AC installation, Westchester County | $5,500 to $12,000 | 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 central AC cost on Long Island?
Central AC, 2 to 2.5 ton, 14-16 SEER2, ducts existing runs $4,500 to $9,000, 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 central AC 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.