Warren Property Taxes, Explained
Warren Township's certified general tax rate is $1.752 per $100 of assessed value on the 2025 Somerset County Abstract of Ratables, and the state's published effective rate for 2025 is 1.841. On the 166 homes that sold in the past twelve months and reported taxes, the median annual bill was $14,182, which worked out to a median 1.27 percent of the sale price. The general rate applies to an assessment, not to a price, and the homes that sold in the past year were assessed on the 2025 tax list at a median 73.7 percent of what they sold for, because that list values property as of October 1, 2024 and prices have moved since. The two are reconciled further down this page, and in full on the tax rate, explained.
Where the money goes
One tax bill funds several governments. The two school districts take the largest share, and the K-8 district is roughly two and a half times the regional high school. The verified 2026 figures:
| Who levies it | 2026 figure | What that means |
|---|---|---|
| Warren Township Schools, K-8 | $53,179,465 levy | The largest single piece. The district estimates a 2026-27 rate of $0.8367 per $100 on the calendar-year levy basis. The note below shows how the levy and the rate reconcile |
| Watchung Hills Regional HS | $0.3470 per $100 | $3,546 on the average assessed Warren home, and the rate fell this year |
| Township of Warren, municipal | $16,545,271 levy | The introduced CY2026 budget added $64 to the average home |
| Somerset County | County set | County operations, open space and the county library system, set by the county budget |
The school rates above come from documents that use different valuation bases: the K-8 User Friendly Budget uses an estimated net taxable valuation of $6,107,636,600 while the regional tax analysis uses Warren ratables of $6,570,823,700. Do not add the component rates together and multiply by one number. The K-8 estimate does reconcile once the year bases are lined up: school budget years straddle two tax calendar years, and the budget's rate page uses the calendar 2026 levy, the average of the 2025-26 levy of $49,022,358 and the 2026-27 levy of $53,179,465. That average, $51,100,912, over the budget's own $6,107,636,600 valuation computes to exactly the $0.8367 the district prints, to the dollar across the district's 2025-26 and 2026-27 User Friendly Budgets. Dividing the full 2026-27 school-year levy by the same valuation gives $0.8707 per $100, which is arithmetic on a different year basis rather than a rate anyone certifies. The certified general rate on your actual bill is the authoritative combined figure.
What Warren homes actually pay
Across the 166 sales of the past twelve months that reported taxes, a quarter of homes paid under $7,960, half paid under $14,182, and a quarter paid over $18,265. These figures cover every residential property type in the MLS, including townhouses and condominiums, which anchor the low end of that range.
Why your assessment is below the price you paid
Warren reassesses every year: the state's approved revaluation and reassessment lists, posted for 2017 through 2026, carry the township in every one of those years. Each list values property as of October 1 of the prior year. The sales on this page were matched to the 2025 list, valued as of October 1, 2024, and the current 2026 list, valued as of October 1, 2025, runs about five percent higher on the average residence. Warren prices rose faster than either list caught up. On the 165 of the past year's sales that carry an assessment on file, the median home was assessed at 73.7 percent of its eventual sale price. The practical rule: never estimate a tax bill by multiplying the tax rate by a market price. Use the actual assessment on the property record, or the current owner's actual bill.
The general rate of $1.752 applied to a 73.7 percent assessment ratio gives about 1.29 percent of sale price, close to the 1.27 percent measured on the bills recent buyers actually carried. The gap is the tax year: the bill on a listing record often reflects the prior year's rate and assessment. The state's effective rate of 1.841 is a different statistic, the town’s total levy measured against the state’s estimate of the full market value of its taxable property, so towns can be compared, and it is never anyone's bill. Read the 1.27 percent as what recent buyers paid in year one, the $1.752 general rate as the number on the bill, and the assessment on the property record as the only sound basis for an estimate. The arithmetic, the rate history since 2015 and the worked examples are on the tax rate, explained.
The mechanics
Property taxes are due quarterly on February 1, May 1, August 1 and November 1, with a grace period the Township sets each year. Warren's grace period is ten days. In 2026 the county certified the rate late, the bills went out late, and under the late bill rule in N.J.S.A. 54:4-64 no interest ran on the third quarter until August 24. Assessment appeals are filed with the Somerset County Board of Taxation by April 1, or by May 1 in a year with a township wide reassessment, which applied in 2026. Confirm current deadlines and balances with the Warren Township Tax Collector before acting on anything here.
Read the underlying reporting
The figures on this page come from documents covered in detail on this site: the two school budgets and what they cost the average Warren home, the CY2026 municipal budget, and the ongoing Warren market page. This page is refreshed as new budgets are adopted.
Earlier versions of this page, from August 20 to September 23, 2026, gave $1.841 as Warren's certified 2025 tax rate and said the township had not conducted a recent revaluation. Both were wrong. The 2025 Somerset County Abstract of Ratables certifies a general rate of $1.752 per $100, and $1.841 is the state's effective rate for the same year. Warren runs an annual reassessment. The short answer, the first tile and the assessment section above now say so.
Updated October 8, 2026, on the twelve months of closings ending October 8, 2026, the same window as the market page and the market tape. Tax figures refresh as budgets are adopted and the county certifies the rate. If a number here disagrees with a Township, county or district document, the document governs.
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Warren Township resident and full time broker, licensed in New Jersey since 2002. Warren, Local. is written from live Garden State MLS data, township records and primary sources. Every figure is traceable to a source listed above.