How much are property taxes going up in Smithtown and Suffolk County for 2026?

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Suffolk County homeowners are facing a base property tax increase of about 3.18 percent. Local town increases are higher. Smithtown is proposing a 10.7 percent hike, while Riverhead is closer to 6.7 percent. On average, Long Island homeowners now pay about $11,232 per year in property taxes, which is roughly 2.3 percent of fair market value.