Verified July 2026 · By Oleg Kachko · Reviewed for accuracy against primary state and county sources
Suffolk County property tax costs the typical homeowner about $10,001 a year, on a median home value of $578,400 – an effective rate of about 1.62%. That is above the national average annual bill of $4,271. This page shows you where that number comes from, who actually sets it, the deadline to challenge it, and the exemptions you may be leaving on the table.
Suffolk County property tax at a Glance
- Effective property tax rate: 1.62%
- Median annual bill: $10,001
- Median home value: $578,400
- Who assesses your home: your city, town or township – not the county.
- Appeal deadline: May 19, 2026 (3rd Tuesday in May)
On this page
Suffolk County property tax: the real numbers
Property tax is the most local tax there is. Two homes of the same value in different counties – sometimes in different towns of the same county – can carry very different bills, because the rate is the sum of every overlapping district that taxes you: the county, the town or city, the school district, and often fire, library or water districts on top. So the suffolk county property tax figure below is an average across the whole county – your own bill depends on which districts you sit inside.
| Figure | Suffolk County | National |
|---|---|---|
| Median annual property tax bill | $10,001 | $4,271 |
| Effective property tax rate | 1.62% | about 0.90% |
| Median home value | $578,400 | – |
Source: U.S. Census Bureau American Community Survey (5-year), the same dataset the Tax Foundation uses. The effective rate is total real-estate taxes paid divided by total owner-occupied home value – so it reflects what people actually pay, not the headline millage rate.
Who actually sets your suffolk county property tax value
This is the part most guides get wrong. In New York, your city, town or township sets your assessed value – not Suffolk County. If you ring the county about your assessment, you are ringing an office that did not set it. Start with your local assessor. The county still matters for the appeal itself, which is covered below.
How often your suffolk county property tax value is reassessed:
Property is assessed by town/city assessors (about 1,000 assessing units – New York is town/city-based, not county), each at its own ‘level of assessment,’ with the state issuing equalization rates to compare across towns. Many places reassess irregularly. NYC uses a class system (Class 1 homes assessed at 6% of value, with capped growth).
How to appeal your suffolk county property tax assessment
⚠ The deadline — miss it and you usually wait a full year
May 19, 2026 (3rd Tuesday in May)
IMPORTANT – IN NEW YORK THE TOWN ASSESSES, NOT THE COUNTY. Suffolk County does not set your assessment; your CITY or TOWN assessor does. The county office below can point you to yours. You challenge the value by filing FORM RP-524 with your town or city assessor or its BOARD OF ASSESSMENT REVIEW (BAR), on or before GRIEVANCE DAY.
SUFFOLK IS AN EXCEPTION: town Boards of Assessment Review meet on the THIRD TUESDAY IN MAY – MAY 19, 2026 – one week EARLIER than the rest of the state. Do not use the fourth-Tuesday date here. If you mail it, it must be RECEIVED by then. Miss Grievance Day and you lose the right to both BAR review and court review (SCAR / Article 7) for that whole year.
WARNING: if you live in a VILLAGE that assesses its own property, the village has a SEPARATE grievance day – usually the THIRD TUESDAY IN FEBRUARY – and it is the deadline people miss most. Confirm your date with your assessor or municipal clerk.
Almost every suffolk county property tax appeal comes down to one claim: the assessor thinks my home is worth more than it really is. Everything below is about proving that.
Do this first, before you file anything: ask for your property record card and read it. A surprising share of assessments are simply wrong on the facts – the wrong square footage, a bathroom you do not have, a finished basement that is bare concrete, a garage that was torn down. Factual errors are the easiest appeals to win, because there is nothing to argue about.
Then build the one thing that actually wins appeals: comparable sales. Find three to five homes near you, as similar as you can get on size, age, and condition, that sold recently for less than your assessed value. Not listings – sales. Not Zillow estimates – recorded sales. Boards ignore opinions and respond to comps.
A successful suffolk county property tax appeal does not change your tax rate – it lowers the value the rate is applied to, which lowers the bill for as long as the new value stands.
Appeals are heard by the your town Board of Assessment Review (BAR). In most places there is a free, informal step first – a conversation or a paper review with the assessor – and it resolves a large share of cases without a hearing. Take it. It costs you nothing and it is the fastest way to win.
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One honest warning: an appeal reviews your value, and a review can go up as well as down. That is uncommon when you bring real comparable sales, and it is exactly why you check your comps before you file.
Where to go: Suffolk County Real Property Tax Service Agency.
Suffolk County property tax exemptions you may qualify for
This is where most homeowners quietly overpay their suffolk county property tax. Exemptions are almost never applied automatically – you have to claim them, and many people simply never do. It is worth ten minutes of your time to check.
NEW YORK’S BIG BREAK IS STAR (School Tax Relief), and it is NOT automatic – you must register. BASIC STAR is for owner-occupied homes with household income under $500,000. ENHANCED STAR is for owners 65+ with income under the annual limit (about $98,700) and is worth substantially more, but it must be RENEWED every year (seniors are strongly advised to enrol in the Income Verification Program so it renews automatically).
NEW HOMEOWNERS now get STAR as a CHECK from the state (the ‘credit’), not as a reduction on the bill (the ‘exemption’) – and once you switch to the credit you cannot switch back. Separately, towns may offer the RPTL 467 SENIOR CITIZENS EXEMPTION, which is a different program with a different income test and STACKS with STAR. Veterans’ exemptions are also local-option. Confirm all of it with your TOWN assessor – not the county.
Homestead: New York has no single homestead exemption; its main relief is STAR (School Tax Relief), which reduces school taxes for owner-occupants. Basic STAR is for incomes up to $500,000; Enhanced STAR is a larger benefit for seniors (below). New applicants receive STAR as a check/credit from the state (register once at tax.ny.gov/star); older enrollees keep it as a bill reduction.
Senior / over-65: Enhanced STAR (statewide) gives seniors 65+ with income under the yearly limit a larger school-tax break. On TOP of that, the local-option Senior Citizens Exemption (SCHE, RPTL 467) can cut assessed value up to 50% for 65+ with low income – adopted separately by each county/town/school district, so amounts vary. Combined, they can cut a senior’s total bill by more than half. File Form RP-467 with your local assessor.
Veteran: Veterans exemptions (locally adopted, partial): the Alternative Veterans Exemption (RPTL 458-a) cuts assessed value 15% for wartime service, +10% for a combat zone, plus more based on VA disability rating; there are also Cold War and Eligible Funds versions. Some localities now also offer a full exemption for 100% disabled veterans. File Form RP-458-a with your local assessor.
Disability: Persons with Disabilities and Limited Income Exemption (RPTL 459-c): a local-option exemption cutting assessed value up to 50% for homeowners with a documented disability and income under the local limit (same income tiers as the senior exemption). File Form RP-459-c with your local assessor. (In NYC this is the Disabled Homeowners’ Exemption, DHE.)
Common questions about suffolk county property tax
Why did my suffolk county property tax bill go up when I did nothing to the house?
Two different things can raise a bill: your assessed value went up, or a taxing district raised its rate. They are separate, and only the first one can be appealed. Your notice will show which changed.
Do I call Suffolk County about my assessment?
No. In this state the county does not set your value – your city, town or township assessor does. Start there.
Is it worth appealing my suffolk county property tax?
Ask one question: would a similar home near mine sell for less than the value the assessor has put on mine? If yes, you have a case, it is usually free to file, and in many places the informal review settles it without a hearing.
Do I need to hire someone to appeal?
No. The informal review and the local board are built for ordinary homeowners to use themselves, and there is normally no fee. Appeal services exist and can be worth it for some people, but you are not required to use one and you should never be told you are.
How is my suffolk county property tax bill actually calculated?
Your assessed value is multiplied by the combined rate of every district that taxes you, then any exemptions you have claimed are subtracted. That is why two neighbours can pay different amounts on identical homes – one of them claimed an exemption the other never did.
More on New York property tax
- New York property tax rates — how Suffolk County compares with every other county in the state.
- How to win your New York property tax appeal — the evidence that works and what to say at the hearing.
- New York property tax exemptions — who qualifies, how much each one saves, and how to apply.
- New York property tax due dates — when the bill is due and what happens if you are late.
- Property tax by state — every state, side by side.
The bottom line on suffolk county property tax
Do two things this week. First, pull your property record card and check the facts – square footage, rooms, condition. Second, check whether you are claiming every exemption you are entitled to, because most people are not. If your suffolk county property tax value looks higher than what a similar home nearby would actually sell for, you have grounds to appeal – and the only thing that can stop you is the deadline above.
Where our suffolk county property tax figures come from
- U.S. Census Bureau, American Community Survey — the rate, median bill and median value on this page.
- Tax Foundation, Property Taxes by State and County — the same dataset and method.
- Suffolk County Real Property Tax Service Agency — the office that can confirm your value, your exemptions and your deadline.
- NY State Dept of Taxation & Finance / ORPTS (tax.ny.gov); Real Property Tax Law; local assessor and NYC Dept of Finance sites
Informational only. Know Property Tax is not a government agency, not a county assessor, and not a tax-appeal service, and this is not legal, tax, or financial advice. Property tax rates, median bills, exemption amounts, and deadlines change every year, and every property is different. Any figure shown here is illustrative. Confirm your rate, your exemptions, and above all your appeal deadline with the office named on this page before you act.
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