Long Island has some of the highest property taxes in the United States. Nassau and Suffolk counties both run on a combination of county, town, school district, and special-district levies — and the school portion alone is usually the biggest line on the bill.
Effective tax rates on Long Island typically run between roughly 1.7% and 2.5% of full market value, but the headline 'rate' you see published is misleading on its own. What actually moves your bill is the assessed value, the equalization rate in your town, and which school district your home sits in.
Nassau County reassessed properties countywide in recent years, which shifted bills meaningfully — some up, some down. Suffolk towns assess on their own schedules, so neighbors in different towns can pay very different amounts on similar homes.
If your tax bill feels high relative to comparable homes, you can grieve your assessment with the local Board of Assessment Review (Nassau) or the town assessor (Suffolk). Deadlines are strict and vary by jurisdiction, so check your specific town's calendar.
For homeowners considering selling, high property taxes are part of the carrying-cost math. A house sitting vacant on Long Island can quietly burn through thousands a month between taxes, insurance, and utilities — which is why many estate and out-of-state owners decide to act sooner rather than later.