On the headline number, the two counties are basically tied. Median Nassau bill is $11,108/yr, median Suffolk bill is $11,328/yr — within 2% of each other. But the way you get to that number is very different in each county, and the effective rate diverges materially.
| Nassau County | Suffolk County | |
|---|---|---|
| Median annual property tax bill | $11,108/yr | $11,328/yr |
| Median single-family home value | $505,000 | $703,972 |
| Median effective property tax rate | 2.08% | 1.83% |
| School districts | 53 | 68 |
| Residential parcels | 386,141 | 461,685 |
| Reassessment frequency | Annual (rolling 4-year cycle) | Sporadic (varies by town) |
| Grievance window | Jan 2 – March 31 (extended) | May 1 – 3rd Tuesday of May |
| Grievance filed with | Nassau ARC (county-wide) | Each town's BAR |
The popular perception is that Nassau is "more expensive" and Suffolk is "cheaper." The actual data says the opposite at the median: Suffolk's median home value is $703,972, Nassau's is $505,000. Suffolk's residential housing stock skews higher because Long Island's Pine Barrens preservation removed huge swaths of low-value rural land from the residential market, leaving mostly suburban-and-up housing on the buildable acreage. Nassau, by contrast, has dense tracts of mid-century working-class housing (sections of Hempstead, Roosevelt, Uniondale) that pull the Nassau median down.
Despite Suffolk's higher home values, the median dollar bills end up roughly equal because Nassau's effective rate is materially higher: 2.08% vs. 1.83% in Suffolk. Nassau's county-wide annual reassessment cycle keeps assessed values close to current market — which means the same dollar tax levy gets applied to a more accurate (and usually higher) value base, producing a higher effective rate per dollar of home.
The practical implication: at the same home value, you'll generally pay more in Nassau than in Suffolk. A $600,000 home in Nassau pays around $12,480/yr at the median rate. The same home in Suffolk pays around $10,980/yr. That's roughly $1,500/yr cheaper in Suffolk on identical home values — but you're probably not buying identical homes; Suffolk homes tend to be larger / on more land for the same dollar.
The two counties run the assessment + collection process almost completely differently:
The Nassau approach produces more stable, predictable bills. The Suffolk approach can create huge distortions where two identical homes pay very different bills because their assessments were last set in different years. More on RAR.
It depends on what you're optimizing for:
Two reasons. First, Nassau's median home value at the district level is actually lower than Suffolk's ($505,000 vs. $703,972) because Nassau has more working-class housing stock that pulls the median down. Second, Nassau's annual reassessment cycle keeps assessed values closer to current market, which means the dollar tax levy gets applied to an accurate (higher) base — producing a higher effective rate. Suffolk's sporadic reassessments mean many homes are assessed at stale, lower values, which shows up as a lower effective rate.
Yes — STAR is a NY State program, not county-specific. Basic STAR saves roughly $600-1,200/yr depending on school tax rate (which varies a lot by district). Enhanced STAR (seniors) saves more. See STAR by district.
Suffolk grievances tend to win larger percentage reductions because Suffolk assessments are often more out of date with current market. Nassau's rolling reassessments keep values closer to current, so the gap between assessed and market is usually smaller — but Nassau wins are more consistent year over year. See grievance cost analysis.
Both counties have incorporated villages that levy their own additional taxes on top of the county/town/school. Nassau has ~64 villages, Suffolk has ~33. Village taxes can add $500-3,000/yr depending on the village. The calculator includes village rates where we have them. Some Nassau villages (Lawrence, Kings Point) have notably high village taxes; some Suffolk villages (Lloyd Harbor, Head of the Harbor) are similar.
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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.