Search any address in Oyster Bay to pull the official NY State assessment, estimated annual tax bill, and comparable nearby parcels.
The New York State assessment roll lists every taxable parcel in Oyster Bay, Nassau County. For each parcel you'll find:
Median full market value in Oyster Bay: $533,000.
The Nassau 2027/28 grievance window closed on March 31, 2026. The next window opens January 2027 for the following cycle.
Long Island homeowners who file a grievance see an average 5-15% reduction in assessed value — which translates roughly 1:1 to annual tax savings. The filing itself is free; firms typically work on contingency (50% of the first-year savings).
Nassau County reassesses every property every year. Each January, ARC publishes the Tentative Assessed Value for the upcoming tax year. If you disagree, you grieve by March 31, 2026.
Visit Nassau's Land Records Viewer (LRV) at lrv.nassaucountyny.gov and search by address or SBL.
We mirror the official NY State assessment roll annually. For closing, escrow, or legal purposes, always verify with your county or town receiver of taxes.
USPS ZIP boundaries don’t match town/village boundaries. Many parcels have a ZIP-implied town that differs from the actual taxing jurisdiction (e.g. a Manhasset address in the Town of North Hempstead). The town shown for grievance purposes is whichever taxing jurisdiction your parcel sits in.
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Subscribe →Last verified: 2026-05-11. Tax rules change; we re-verify each page quarterly.
Estimates and educational content only — not legal, tax, or financial advice. Verify with your county or town receiver, an attorney, or a CPA before making financial decisions.