What’s on your Smithtown assessment
The New York State assessment roll lists every taxable parcel in Smithtown, Suffolk County. For each parcel you’ll find:
- Full Market Value — what the assessor says the property is worth (compare to recent sales of similar nearby homes)
- Assessment — the taxable value (in Nassau, this is 10% of market value via the Level of Assessment; in Suffolk, this is closer to actual market value)
- Property Class — ORPTS code (210 = single family, 220 = two family, 411 = apartment, etc.)
- Section / Block / Lot (SBL) — your parcel’s unique ID
- School District — which of LI’s 121 districts you’re in
- Existing exemptions — STAR, Senior, Veteran, Volunteer Firefighter, etc., already applied to the seller’s bill
Median full market value in Smithtown: $682,500.
Grievance — Smithtown
Suffolk’s 2026/27 Grievance Day was Tuesday, May 19, 2026. The next Grievance Day is May 18, 2027 (third Tuesday of May).
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).
Official links
- Town of Smithtown — Receiver of Taxes — https://www.smithtownny.gov/179/Receiver-of-Taxes — pay your bill, see due dates, request copies
- Smithtown Board of Assessment Review (BAR) — Contact via your Town Clerk’s office for the BAR schedule and Form RP-524.
- NY State assessment data portal — data.ny.gov — raw parcel-level data (we re-index this annually)
Smithtown assessment FAQs
How often does Smithtown reassess properties?
Suffolk towns vary. Most update assessments only when properties sell, get permitted improvements, or are challenged. Many homes haven’t been reassessed in 5-10+ years — comparing your market value to recent sales is the fastest way to spot an over-assessment.
How do I find my exact assessment without using this site?
Visit your town’s assessor or use our search above — we pull from the same NY State ORPTS data.
Is the data on this site the official assessment?
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.
My address shows the wrong town. Why?
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.
Get one email when LI tax rules change
Grievance deadlines, STAR limit updates, new exemption laws. One short email, only when something actionable happens. Unsubscribe in one click.
Sources and citations
- NY State Open Data — Property Assessment Data data.ny.gov
- NY Tax & Finance — Contest your assessment tax.ny.gov
- Suffolk County Comptroller — Information for taxpayers suffolkcountyny.gov
Last verified May 11, 2026. Tax rules change; we re-check every page each quarter.
Educational content and estimates only, not legal, tax or financial advice. Verify with your county or town receiver, an attorney or a CPA before making financial decisions.