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2025 general tax rate · Somerset County, NJ
Green Brook Township property tax rate
Green Brook Township's 2025 general tax rate is $2.125 per $100 of assessed value. A property assessed at $300,000 owes $6,375.00 for the year. That ranks 419th highest of New Jersey's 564 municipalities, below the middle, $0.830 per $100 below the $2.960 per $100 state median.
- 1General tax rate $2.125 per $100
- 2Bill on $300,000 assessed $6,375.00
Your Green Brook Township tax bill
The bill before exemptions and credits. Compare every New Jersey rate.
General rate and effective rate in Green Brook Township
New Jersey publishes two rates for every municipality. The general tax rate, $2.125 per $100 in Green Brook Township, is the one applied to the assessed value on the bill: $300,000 assessed owes $6,375.00. The effective tax rate, $2.165 per $100, is "the general property tax adjusted by the municipality's equalization ratio", the rate on market value. Dividing one by the other puts Green Brook Township's assessments at about 101.88% of market value, above market value on average; the state median is 70.02%.
The effective rate is the fairer comparison between towns. On it Green Brook Township ranks 271st of 564, against 419th on the general rate, and sits $0.020 above the $2.140 median effective rate. At 101.88%, a $300,000 assessment corresponds to roughly $294,464 of market value.
Green Brook Township's rate in 2024 and 2025
The general tax rate fell $0.090 per $100 (4.02%) from $2.214 per $100 in 2024, and the same $300,000 assessment owes $267.00 less than at last year's rate. In 2024 Green Brook Township ranked 402nd. The effective rate went from $2.242 to $2.165 per $100 (down 3.43%), and the implied ratio from 101.26% to 101.88%.
Tax on common assessed values in Green Brook Township
| Assessed value | 2025 bill | At the 2024 rate | Versus NJ median rate |
|---|---|---|---|
| $200,000 | $4,250.00 | $4,428.00 | −$1,670.00 |
| $300,000 | $6,375.00 | $6,642.00 | −$2,505.00 |
| $400,000 | $8,500.00 | $8,856.00 | −$3,340.00 |
| $500,000 | $10,625.00 | $11,070.00 | −$4,175.00 |
| $750,000 | $15,937.50 | $16,605.00 | −$6,262.50 |
Each bill is the assessed value divided by 100 and multiplied by $2.125, before exemptions, credits or special charges. These are assessed values, not sale prices: at 101.88% the $300,000 row is a property worth about $294,464. The last column is the difference from the same assessment at the $2.960 per $100 state median.
How Green Brook Township compares in Somerset County and New Jersey
Among the 21 municipalities in Somerset County, Green Brook Township ranks 9th highest; the county median is $2.081 per $100, so Green Brook Township sits $0.040 per $100 above it. The next higher rate in the county is Millstone Borough at $2.154, and the next lower is Manville at $2.110. Statewide, 25% of municipalities have a lower general tax rate than Green Brook Township.
Outside Somerset County, the closest rates are Lambertville ($2.126, Hunterdon), Mahwah Township ($2.127, Bergen), Wall Township ($2.127, Monmouth), West Amwell Township ($2.128, Hunterdon). Because towns assess at different shares of market value, the effective rate is the better guide to what a house of a given price pays.
Appealing a Green Brook Township assessment
New Jersey appeals go to the Somerset County Board of Taxation. The petition is due April 1, or May 1 in a year when Green Brook Township implemented a municipal-wide revaluation or reassessment (NJ Division of Taxation). Property assessed above $1,000,000 may go directly to the Tax Court, and a County Board judgment can be appealed to the Tax Court within 45 days. The Board tests the assessment against the common level range: the average ratio plus or minus 15%. Using the 101.88% ratio implied by the state's two rates, that range runs from about 86.6% to 117.16% of market value; the Director's official average ratio for Green Brook Township, which the County Board applies, can differ slightly.
The New Jersey appeal page sets out each step with its source and the ratio arithmetic. This is a summary of the published procedure, not legal advice.
Green Brook Township property tax questions
What is the property tax rate in Green Brook Township, NJ?
Green Brook Township's 2025 general tax rate is $2.125 per $100 of assessed value; its effective rate, on market value, is $2.165 per $100. Source: New Jersey Division of Taxation.
How much is the property tax on a $300,000 assessment in Green Brook Township?
$300,000 ÷ 100 × $2.125 = $6,375.00 a year, before exemptions and credits. At the 2024 rate the same assessment owed $6,642.00.
Is Green Brook Township's tax rate high for New Jersey?
It ranks 419th highest of 564, below the middle of New Jersey municipalities; the median is $2.960 per $100. On the effective rate, which allows for different assessment levels, it ranks 271st.
How do I appeal a Green Brook Township property assessment?
Petition to the County Board of Taxation: by April 1 (May 1 after a municipal-wide revaluation) (NJ Division of Taxation; Guide to Tax Appeal Hearings). Then: county board hearing and judgment (Set by the County Board); appeal to the tax court (Within 45 days of the County Board's judgment).
Source: New Jersey Division of Taxation, 2025 General Tax Rates (general and effective tax rates by county and municipality); prior year from the 2024 General Tax Rates. Appeal steps: NJ Division of Taxation, Assessment and Appeals (updated August 15, 2025); NJ Division of Taxation, A Guide to Tax Appeal Hearings (revised 2022). Last checked October 21, 2026. This page explains published figures; it is not tax or legal advice.