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2025 general tax rate · Somerset County, NJ
Rocky Hill property tax rate
Rocky Hill's 2025 general tax rate is $2.081 per $100 of assessed value. A property assessed at $300,000 owes $6,243.00 for the year. That ranks 428th highest of New Jersey's 564 municipalities, in the lowest quarter, $0.880 per $100 below the $2.960 per $100 state median.
- 1General tax rate $2.081 per $100
- 2Bill on $300,000 assessed $6,243.00
Your Rocky Hill tax bill
The bill before exemptions and credits. Compare every New Jersey rate.
General rate and effective rate in Rocky Hill
New Jersey publishes two rates for every municipality. The general tax rate, $2.081 per $100 in Rocky Hill, is the one applied to the assessed value on the bill: $300,000 assessed owes $6,243.00. The effective tax rate, $2.071 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 Rocky Hill's assessments at about 99.52% of market value; the state median is 70.02%.
The effective rate is the fairer comparison between towns. On it Rocky Hill ranks 316th of 564, against 428th on the general rate, and sits $0.070 below the $2.140 median effective rate. At 99.52%, a $300,000 assessment corresponds to roughly $301,447 of market value.
Rocky Hill's rate in 2024 and 2025
The general tax rate is unchanged from $2.078 per $100 in 2024, and the same $300,000 assessment owes $9.00 more than at last year's rate. In 2024 Rocky Hill ranked 432nd. The effective rate went from $2.097 to $2.071 per $100 (down 1.24%), and the implied ratio from 100.91% to 99.52%: market values rose faster than assessments.
Tax on common assessed values in Rocky Hill
| Assessed value | 2025 bill | At the 2024 rate | Versus NJ median rate |
|---|---|---|---|
| $200,000 | $4,162.00 | $4,156.00 | −$1,758.00 |
| $300,000 | $6,243.00 | $6,234.00 | −$2,637.00 |
| $400,000 | $8,324.00 | $8,312.00 | −$3,516.00 |
| $500,000 | $10,405.00 | $10,390.00 | −$4,395.00 |
| $750,000 | $15,607.50 | $15,585.00 | −$6,592.50 |
Each bill is the assessed value divided by 100 and multiplied by $2.081, before exemptions, credits or special charges. These are assessed values, not sale prices: at 99.52% the $300,000 row is a property worth about $301,447. The last column is the difference from the same assessment at the $2.960 per $100 state median.
How Rocky Hill compares in Somerset County and New Jersey
Among the 21 municipalities in Somerset County, Rocky Hill ranks 11th highest; the county median is $2.081 per $100, so Rocky Hill sits exactly on it. The next higher rate in the county is Manville at $2.110, and the next lower is Watchung at $1.952. Statewide, 24% of municipalities have a lower general tax rate than Rocky Hill.
Outside Somerset County, the closest rates are Fairfield Township (Essex County) ($2.081, Essex), Middle Township ($2.082, Cape May), Matawan ($2.087, Monmouth), Closter ($2.072, Bergen). 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 Rocky Hill 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 Rocky Hill 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 99.52% ratio implied by the state's two rates, that range runs from about 84.59% to 114.45% of market value; the Director's official average ratio for Rocky Hill, 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.
Rocky Hill property tax questions
What is the property tax rate in Rocky Hill, NJ?
Rocky Hill's 2025 general tax rate is $2.081 per $100 of assessed value; its effective rate, on market value, is $2.071 per $100. Source: New Jersey Division of Taxation.
How much is the property tax on a $300,000 assessment in Rocky Hill?
$300,000 ÷ 100 × $2.081 = $6,243.00 a year, before exemptions and credits. At the 2024 rate the same assessment owed $6,234.00.
Is Rocky Hill's tax rate high for New Jersey?
It ranks 428th highest of 564, in the lowest quarter of New Jersey municipalities; the median is $2.960 per $100. On the effective rate, which allows for different assessment levels, it ranks 316th.
How do I appeal a Rocky Hill 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.