Quick answer. Roselle Park Borough, Union County, had a 2025 general tax rate of 4.506 per $100 of assessed value, and the average residential bill was $11,417 on an average assessment of $253,379. A bill is your assessed value × 4.506 ÷ 100. Source: 2025 General Tax Rates and 2025 Average Residential Statistics, NJ Division of Taxation.
General rate (2025)
4.506used to compute a bill
Effective rate (2025)
2.521for comparing towns only
Average residential bill
$11,41713th of 21 in the county
Average ratio
51.87%assessed to true value
Estimate a Roselle Park Borough property tax bill
Enter a value to see the 2025 tax at Roselle Park Borough's general rate.
For the current year's rate and your exact bill, ask the borough tax collector. For a different town, use the statewide calculator.
What homes at different prices pay in Roselle Park Borough
Assessments in the borough averaged 51.87% of true value, which is why its general rate (4.506) is higher than its effective rate (2.521). A home is not taxed at the general rate on its full market value. The table turns each market value into an assessed value with that 51.87% average ratio (Amended Table of Equalized Valuations 2025), then applies the general rate.
| Market value | Est. assessed value | Est. yearly tax |
|---|---|---|
| $300,000 | $155,610 | $7,012 |
| $450,000 | $233,415 | $10,518 |
| $600,000 | $311,220 | $14,024 |
| $800,000 | $414,960 | $18,698 |
| $1,000,000 | $518,700 | $23,373 |
Individual assessments vary around the town average, so a home's real assessed value can be higher or lower than the estimate here. The figure on your own bill or assessment notice is the one that counts.
Roselle Park Borough by the numbers
- Every $100,000 of assessed value in the borough carried $4,506 of 2025 tax, or $376 a month.
- The average the borough home was assessed at $253,379 and billed $11,417, about $951 a month or $2,854 a quarter.
- At the 51.87% average ratio, $253,379 of assessed value stands for roughly $488,489 of market value.
- For tax year 2027, a borough home truly worth $450,000 falls inside the certified range when it is assessed between $185,355 and $250,785.
How Roselle Park Borough compares
The borough’s 2025 effective tax rate of 2.521 is the 4th highest of 21 Union County municipalities and the 119th highest of 564 in New Jersey. It is above the county median of 2.113 and above the statewide median of 2.140. Its average residential bill of $11,417 ranks 13th of 21 in the county and 195th of 563 statewide, $534 less than the median Union County town's $11,951.
The towns closest to it in Union County by effective rate:
| Town | General rate | Effective rate | Avg residential bill |
|---|---|---|---|
| Roselle Borough | 9.147 | 2.819 | $11,229 |
| Rahway City | 7.584 | 2.542 | $10,435 |
| Roselle Park Borough | 4.506 | 2.521 | $11,417 |
| Plainfield City | 8.926 | 2.460 | $9,755 |
| Hillside Township | 8.899 | 2.279 | $10,961 |
See all 21 Union County towns in one sortable table.
If a Roselle Park Borough assessment looks too high
Assessment appeals go to the Union County Board of Taxation: 300 North Avenue East, Westfield, NJ 07090, phone (908) 527-4775 (State contact list, September 2026). The Division's appeals page gives the filing deadline as April 1, or May 1 when the town has had a revaluation or reassessment.
An owner must show the assessment doesn't fairly reflect true market value or falls outside the common level range. For tax year 2027 the range certified for the borough is 41.19% to 55.73%, around an average ratio of 48.46% (2026 Average Ratios and Common Level Ranges). You appeal the assessment, not the tax rate. This page describes the State's published process and is not legal advice.
Related: NJ senior tax relief checker · NJ property tax relief for seniors · NJ SALT deduction calculator
The borough figures above come from the State's published tables (rates, average residential statistics, equalized valuations, 2027 ranges, definitions), opened and checked November 2026. Not tax or legal advice, and MCC Solutions is not affiliated with the State, the county board or the borough. Exemptions, deductions, appeals, added assessments and the newer year's rate all change a real bill.
Common questions
What is the property tax rate in Roselle Park Borough, Union County?
The 2025 general tax rate was 4.506 per $100 of assessed value, from the Division of Taxation's 2025 General Tax Rates table. That is the rate applied to an assessed value. The effective rate, the State's figure for comparing towns, was 2.521.
What is the average property tax bill in Roselle Park Borough?
$11,417 in 2025 on an average residential assessment of $253,379, according to the Division's 2025 Average Residential Statistics. It ranked 13th of 21 in Union County.
How do I work out my own Roselle Park Borough property tax?
Multiply your assessed value by 4.506 and divide by 100. If you only know market value, multiply it by 51.87% first, the town's average ratio of assessed to true value; a $450,000 home works out to about $10,518 a year that way. Your own assessment is on your bill and may sit above or below the average.
Is this the 2026 rate for Roselle Park Borough?
No. It is the 2025 rate, the latest year in the Division's general tax rate table when this page was checked (November 2026). The Roselle Park Borough tax collector can give you the current year's rate.
Is Roselle Park Borough a high-tax town for Union County?
By effective rate, the State's figure for comparing towns, the borough is 4th highest of 21 in Union County at 2.521; the county's highest is Winfield Township at 23.405 and its lowest is Summit City at 1.475. By average residential bill it is 13th of 21, at $11,417.