Quick answer. Union Township, Union County, had a 2025 general tax rate of 23.323 per $100 of assessed value, and the average residential bill was $10,849 on an average assessment of $46,516. A bill is your assessed value × 23.323 ÷ 100. Source: 2025 General Tax Rates and 2025 Average Residential Statistics, NJ Division of Taxation.
General rate (2025)
23.323used to compute a bill
Effective rate (2025)
2.270for comparing towns only
Average residential bill
$10,84916th of 21 in the county
Average ratio
8.89%assessed to true value
Estimate a Union Township property tax bill
Enter a value to see the 2025 tax at Union Township's general rate.
For the current year's rate and your exact bill, ask the Union Township tax collector. For a different town, use the statewide calculator.
What homes at different prices pay in Union Township
Assessments in Union Township averaged 8.89% of true value, which is why its general rate (23.323) is higher than its effective rate (2.270). 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 8.89% average ratio (Amended Table of Equalized Valuations 2025), then applies the general rate.
| Market value | Est. assessed value | Est. yearly tax |
|---|---|---|
| $300,000 | $26,670 | $6,220 |
| $450,000 | $40,005 | $9,330 |
| $600,000 | $53,340 | $12,440 |
| $800,000 | $71,120 | $16,587 |
| $1,000,000 | $88,900 | $20,734 |
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.
Union Township by the numbers
- Every $100,000 of assessed value in Union Township carried $23,323 of 2025 tax, or $1,944 a month.
- The average Union Township home was assessed at $46,516 and billed $10,849, about $904 a month or $2,712 a quarter.
- At the 8.89% average ratio, $46,516 of assessed value stands for roughly $523,240 of market value.
- For tax year 2027, a Union Township home truly worth $450,000 falls inside the certified range when it is assessed between $30,735 and $41,535.
How Union Township compares
Union Township's 2025 effective tax rate of 2.270 is the 7th highest of 21 Union County municipalities and the 222nd 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 $10,849 ranks 16th of 21 in the county and 231st of 563 statewide, $1,102 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 |
|---|---|---|---|
| Plainfield City | 8.926 | 2.460 | $9,755 |
| Hillside Township | 8.899 | 2.279 | $10,961 |
| Union Township | 23.323 | 2.270 | $10,849 |
| Fanwood Borough | 3.120 | 2.249 | $14,759 |
| Springfield Township | 2.411 | 2.188 | $12,974 |
See all 21 Union County towns in one sortable table.
If a Union Township 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 Union Township is 6.83% to 9.23%, around an average ratio of 8.03% (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
Union Township 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 area. 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 Union Township, Union County?
The 2025 general tax rate was 23.323 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 2.270.
What is the average property tax bill in Union Township?
$10,849 in 2025 on an average residential assessment of $46,516, according to the Division's 2025 Average Residential Statistics. It ranked 16th of 21 in Union County.
How do I work out my own Union Township property tax?
Multiply your assessed value by 23.323 and divide by 100. If you only know market value, multiply it by 8.89% first, the town's average ratio of assessed to true value; a $450,000 home works out to about $9,330 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 Union Township?
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 Union Township tax collector can give you the current year's rate.
Is Union Township a high-tax town for Union County?
By effective rate, the State's figure for comparing towns, the area is 7th highest of 21 in Union County at 2.270; 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 16th of 21, at $10,849.